Adam Przepiórkowski


2019

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Coordination of Unlike Grammatical Functions
Agnieszka Patejuk | Adam Przepiórkowski
Proceedings of the Fifth International Conference on Dependency Linguistics (Depling, SyntaxFest 2019)

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SyntaxFest 2019 Invited talk - Arguments and adjuncts
Adam Przepiórkowski
Proceedings of the Third Workshop on Universal Dependencies (UDW, SyntaxFest 2019)

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Nested Coordination in Universal Dependencies
Adam Przepiórkowski | Agnieszka Patejuk
Proceedings of the Third Workshop on Universal Dependencies (UDW, SyntaxFest 2019)

2018

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Arguments and Adjuncts in Universal Dependencies
Adam Przepiórkowski | Agnieszka Patejuk
Proceedings of the 27th International Conference on Computational Linguistics

The aim of this paper is to argue for a coherent Universal Dependencies approach to the core vs. non-core distinction. We demonstrate inconsistencies in the current version 2 of UD in this respect – mostly resulting from the preservation of the argument–adjunct dichotomy despite the declared avoidance of this distinction – and propose a relatively conservative modification of UD that is free from these problems.

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From Lexical Functional Grammar to Enhanced Universal Dependencies
Adam Przepiórkowski | Agnieszka Patejuk
Proceedings of the Joint Workshop on Linguistic Annotation, Multiword Expressions and Constructions (LAW-MWE-CxG-2018)

This is a summary of an invited talk.

2014

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Semantic Roles in Grammar Engineering
Wojciech Jaworski | Adam Przepiórkowski
Proceedings of the Third Joint Conference on Lexical and Computational Semantics (*SEM 2014)

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Extended phraseological information in a valence dictionary for NLP applications
Adam Przepiórkowski | Elżbieta Hajnicz | Agnieszka Patejuk | Marcin Woliński
Proceedings of Workshop on Lexical and Grammatical Resources for Language Processing

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Walenty: Towards a comprehensive valence dictionary of Polish
Adam Przepiórkowski | Elżbieta Hajnicz | Agnieszka Patejuk | Marcin Woliński | Filip Skwarski | Marek Świdziński
Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC'14)

This paper presents Walenty, a comprehensive valence dictionary of Polish, with a number of novel features, as compared to other such dictionaries. The notion of argument is based on the coordination test and takes into consideration the possibility of diverse morphosyntactic realisations. Some aspects of the internal structure of phraseological (idiomatic) arguments are handled explicitly. While the current version of the dictionary concentrates on syntax, it already contains some semantic features, including semantically defined arguments, such as locative, temporal or manner, as well as control and raising, and work on extending it with semantic roles and selectional preferences is in progress. Although Walenty is still being intensively developed, it is already by far the largest Polish valence dictionary, with around 8600 verbal lemmata and almost 39 000 valence schemata. The dictionary is publicly available on the Creative Commons BY SA licence and may be downloaded from http://zil.ipipan.waw.pl/Walenty.

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The Strategic Impact of META-NET on the Regional, National and International Level
Georg Rehm | Hans Uszkoreit | Sophia Ananiadou | Núria Bel | Audronė Bielevičienė | Lars Borin | António Branco | Gerhard Budin | Nicoletta Calzolari | Walter Daelemans | Radovan Garabík | Marko Grobelnik | Carmen García-Mateo | Josef van Genabith | Jan Hajič | Inma Hernáez | John Judge | Svetla Koeva | Simon Krek | Cvetana Krstev | Krister Lindén | Bernardo Magnini | Joseph Mariani | John McNaught | Maite Melero | Monica Monachini | Asunción Moreno | Jan Odijk | Maciej Ogrodniczuk | Piotr Pęzik | Stelios Piperidis | Adam Przepiórkowski | Eiríkur Rögnvaldsson | Michael Rosner | Bolette Pedersen | Inguna Skadiņa | Koenraad De Smedt | Marko Tadić | Paul Thompson | Dan Tufiş | Tamás Váradi | Andrejs Vasiļjevs | Kadri Vider | Jolanta Zabarskaite
Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC'14)

This article provides an overview of the dissemination work carried out in META-NET from 2010 until early 2014; we describe its impact on the regional, national and international level, mainly with regard to politics and the situation of funding for LT topics. This paper documents the initiative’s work throughout Europe in order to boost progress and innovation in our field.

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Projection-based Annotation of a Polish Dependency Treebank
Alina Wróblewska | Adam Przepiórkowski
Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC'14)

This paper presents an approach of automatic annotation of sentences with dependency structures. The approach builds on the idea of cross-lingual dependency projection. The presented method of acquiring dependency trees involves a weighting factor in the processes of projecting source dependency relations to target sentences and inducing well-formed target dependency trees from sets of projected dependency relations. Using a parallel corpus, source trees are transferred onto equivalent target sentences via an extended set of alignment links. Projected arcs are initially weighted according to the certainty of word alignment links. Then, arc weights are recalculated using a method based on the EM selection algorithm. Maximum spanning trees selected from EM-scored digraphs and labelled with appropriate grammatical functions constitute a target dependency treebank. Extrinsic evaluation shows that parsers trained on such a treebank may perform comparably to parsers trained on a manually developed treebank.

2013

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Overview of the SPMRL 2013 Shared Task: A Cross-Framework Evaluation of Parsing Morphologically Rich Languages
Djamé Seddah | Reut Tsarfaty | Sandra Kübler | Marie Candito | Jinho D. Choi | Richárd Farkas | Jennifer Foster | Iakes Goenaga | Koldo Gojenola Galletebeitia | Yoav Goldberg | Spence Green | Nizar Habash | Marco Kuhlmann | Wolfgang Maier | Joakim Nivre | Adam Przepiórkowski | Ryan Roth | Wolfgang Seeker | Yannick Versley | Veronika Vincze | Marcin Woliński | Alina Wróblewska | Eric Villemonte de la Clergerie
Proceedings of the Fourth Workshop on Statistical Parsing of Morphologically-Rich Languages

2012

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Towards a comprehensive open repository of Polish language resources
Maciej Ogrodniczuk | Piotr Pęzik | Adam Przepiórkowski
Proceedings of the Eighth International Conference on Language Resources and Evaluation (LREC'12)

The aim of this paper is to present current efforts towards the creation of a comprehensive open repository of Polish language resources and tools (LRTs). The work described here is carried out within the CESAR project, member of the META-NET consortium. It has already resulted in the creation of the Computational Linguistics in Poland site containing an exhaustive collection of Polish LRTs. Current work is focused on the creation of new LRTs and, esp., the enhancement of existing LRTs, such as parallel corpora, annotated corpora of written and spoken Polish and morphological dictionaries to be made available via the META-SHARE repository.

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Towards an LFG parser for Polish: An exercise in parasitic grammar development
Agnieszka Patejuk | Adam Przepiórkowski
Proceedings of the Eighth International Conference on Language Resources and Evaluation (LREC'12)

While it is possible to build a formal grammar manually from scratch or, going to another extreme, to derive it automatically from a treebank, the development of the LFG grammar of Polish presented in this paper is different from both of these methods as it relies on extensive reuse of existing language resources for Polish. LFG grammars minimally provide two levels of representation: constituent structure (c-structure) produced by context-free phrase structure rules and functional structure (f-structure) created by functional descriptions. The c-structure was based on a DCG grammar of Polish, while the f-structure level was mainly inspired by the available HPSG analyses of Polish. The morphosyntactic information needed to create a lexicon may be taken from one of the following resources: a morphological analyser, a treebank or a corpus. Valence information from the dictionary which accompanies the DCG grammar was converted so that subcategorisation is stated in terms of grammatical functions rather than categories; additionally, missing valence frames may be extracted from the treebank. The obtained grammar is evaluated using constructed testsuites (half of which were provided by previous grammars) and the treebank.

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PoliMorf: a (not so) new open morphological dictionary for Polish
Marcin Woliński | Marcin Miłkowski | Maciej Ogrodniczuk | Adam Przepiórkowski
Proceedings of the Eighth International Conference on Language Resources and Evaluation (LREC'12)

This paper presents preliminary results of an effort aiming at the creation of a morphological dictionary of Polish, PoliMorf, available under a very liberal BSD-style license. The dictionary is a result of a merger of two existing resources, SGJP and Morfologik and was prepared within the CESAR/META-NET initiative. The work completed so far includes re-licensing of the two dictionaries and filling the new resource with the morphological data semi-automatically unified from both sources. The merging process is controlled by the collaborative dictionary development web application Kuźnia, also implemented within the project. The tool involves several advanced features such as using SGJP inflectional patterns for form generation, possibility of attaching dictionary labels and classification schemes to lexemes, dictionary source record and change tracking. Since SGJP and Morfologik are already used in a significant number of Natural Language Processing projects in Poland, we expect PoliMorf to become the Polish morphological dictionary of choice for many years to come.

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Machine Learning of Syntactic Attachment from Morphosyntactic and Semantic Co-occurrence Statistics
Szymon Acedański | Adam Slaski | Adam Przepiórkowski
Proceedings of the ACL 2012 Joint Workshop on Statistical Parsing and Semantic Processing of Morphologically Rich Languages

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Simultaneous error detection at two levels of syntactic annotation
Adam Przepiórkowski | Michał Lenart
Proceedings of the Sixth Linguistic Annotation Workshop

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Harnessing NLP Techniques in the Processes of Multilingual Content Management
Anelia Belogay | Diman Karagyozov | Svetla Koeva | Cristina Vertan | Adam Przepiórkowski | Dan Cristea | Plovios Raxis
Proceedings of the Demonstrations at the 13th Conference of the European Chapter of the Association for Computational Linguistics

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A Comprehensive Analysis of Constituent Coordination for Grammar Engineering
Agnieszka Patejuk | Adam Przepiórkowski
Proceedings of COLING 2012

2010

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Towards the Adequate Evaluation of Morphosyntactic Taggers
Szymon Acedański | Adam Przepiórkowski
Coling 2010: Posters

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Recent Developments in the National Corpus of Polish
Adam Przepiórkowski | Rafał L. Górski | Marek Łaziński | Piotr Pęzik
Proceedings of the Seventh International Conference on Language Resources and Evaluation (LREC'10)

The aim of the paper is to present recent ― as of March 2010 ― developments in the construction of the National Corpus of Polish (NKJP). The NKJP project was launched at the very end of 2007 and it is aimed at compiling a large, linguistically annotated corpus of contemporary Polish by the end of 2010. Out of the total pool of 1 billion words of text data collected in the project, a 300 million word balanced corpus will be selected to match a set of predefined representativeness criteria. This present paper outlines a number of recent developments in the NKJP project, including: 1) the design of text encoding XML schemata for various levels of linguistic information, 2) a new tool for manual annotation at various levels, 3) numerous improvements in search tools. As the work on NKJP progresses, it becomes clear that this project serves as an important testbed for linguistic annotation and interoperability standards. We believe that our recent experiences will prove relevant to future large-scale language resource compilation efforts.

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The Design of Syntactic Annotation Levels in the National Corpus of Polish
Katarzyna Głowińska | Adam Przepiórkowski
Proceedings of the Seventh International Conference on Language Resources and Evaluation (LREC'10)

The paper presents the procedure of syntactic annotation of the National Corpus of Polish. The paper concentrates on the delimitation of syntactic words (analytical forms, reflexive verbs, discontinuous conjunctions, etc.) and syntactic groups, as well as on problems encountered during the annotation process: syntactic group boundaries, multiword entities, abbreviations, discontinuous phrases and syntactic words. It includes the complete tagset for syntactic words and the list of syntactic groups recognized in NKJP. The tagset defines grammatical classes and categories according to morphosyntactic and syntactic criteria only. Syntactic annotation in the National Corpus of Polish is limited to making constituents of combinations of words. Annotation depends on shallow parsing and manual post-editing of the results by annotators. Manual annotation is performed by two independents annotators, with a referee in cases of disagreement. The manually constructed grammar, both for syntactic words and for syntactic groups, is encoded in the shallow parsing system Spejd.

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Towards the Annotation of Named Entities in the National Corpus of Polish
Agata Savary | Jakub Waszczuk | Adam Przepiórkowski
Proceedings of the Seventh International Conference on Language Resources and Evaluation (LREC'10)

We present the named entity annotation task within the on-going project of the National Corpus of Polish. To the best of our knowledge, this is the first attempt at a large-scale corpus annotation of Polish named entities. We describe the scope and the TEI-inspired hierarchy of named entities admitted for this task, as well as the TEI-conformant multi-level stand-off annotation format. We also discuss some methodological strategies including the annotation of embedded, coordinated and discontinuous names. Our annotation platform consists of two main tools interconnected by converting facilities. A rule-based natural language processing platform SProUT is used for the automatic pre-annotation of named entities, due to the previously created Polish extraction grammars adapted to the annotation task. A customizable graphical tree editor TrEd, extended to our needs, provides an ergonomic environment for manual correction of annotations. Despite some difficult cases encountered in the early annotation phase, about 2,600 named entities in 1,800 corpus sentences have presently been annotated, which allowed to validate the project methodology and tools.

2009

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Stand-off TEI Annotation: the Case of the National Corpus of Polish
Piotr Bański | Adam Przepiórkowski
Proceedings of the Third Linguistic Annotation Workshop (LAW III)

2008

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Definition Extraction Using a Sequential Combination of Baseline Grammars and Machine Learning Classifiers
Łukasz Degórski | Michał Marcińczuk | Adam Przepiórkowski
Proceedings of the Sixth International Conference on Language Resources and Evaluation (LREC'08)

The paper deals with the task of definition extraction from a small and noisy corpus of instructive texts. Three approaches are presented: Partial Parsing, Machine Learning and a sequential combination of both. We show that applying ML methods with the support of a trivial grammar gives results better than a relatively complicated partial grammar, and much better than pure ML approach.

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Towards the National Corpus of Polish
Adam Przepiórkowski | Rafał L. Górski | Barbara Lewandowska-Tomaszyk | Marek Łaziński
Proceedings of the Sixth International Conference on Language Resources and Evaluation (LREC'08)

This paper presents a new corpus project, aiming at building a national corpus of Polish. What makes it different from a typical YACP (Yet Another Corpus Project) is 1) the fact that all four partners in the project have in the past constructed corpora of Polish, sometimes in the spirit of collaboration, at other times - in the spirit of competition, 2) the partners bring into the project varying areas of expertise and experience, so the synergy effect is anticipated, 3) the corpus will be built with an eye on specific applications in various fields, including lexicography (the corpus will be the empirical basis of a new large general dictionary of Polish) and natural language processing (a number of NLP tools will be constructed within the project).

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♠ Demo: An Open Source Tool for Partial Parsing and Morphosyntactic Disambiguation
Aleksander Buczyński | Adam Przepiórkowski
Proceedings of the Sixth International Conference on Language Resources and Evaluation (LREC'08)

The paper presents Spejd, an Open Source Shallow Parsing and Disambiguation Engine. Spejd (abbreviated to ♠) is based on a fully uniform formalism both for constituency partial parsing and for morphosyntactic disambiguation - the same grammar rule may contain structure-building operations, as well as morphosyntactic correction and disambiguation operations. The formalism and the engine are more flexible than either the usual shallow parsing formalisms, which assume disambiguated input, or the usual unification-based formalisms, which couple disambiguation (via unification) with structure building. Current applications of Spejd include rule-based disambiguation, detection of multiword expressions, valence acquisition, and sentiment analysis. The functionality can be further extended by adding external lexical resources. While the examples are based on the set of rules prepared for the parsing of the IPI PAN Corpus of Polish, ♠ is fully language-independent and we hope it will also be useful in the processing of other languages.

2007

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Slavic Information Extraction and Partial Parsing
Adam Przepiórkowski
Proceedings of the Workshop on Balto-Slavonic Natural Language Processing

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Towards the Automatic Extraction of Definitions in Slavic
Adam Przepiórkowski | Łukasz Degórski | Miroslav Spousta | Kiril Simov | Petya Osenova | Lothar Lemnitzer | Vladislav Kuboň | Beata Wójtowicz
Proceedings of the Workshop on Balto-Slavonic Natural Language Processing

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Poliqarp: An open source corpus indexer and search engine with syntactic extensions
Daniel Janus | Adam Przepiórkowski
Proceedings of the 45th Annual Meeting of the Association for Computational Linguistics Companion Volume Proceedings of the Demo and Poster Sessions

2004

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A Search Tool for Corpora with Positional Tagsets and Ambiguities
Adam Przepiórkowski | Zygmunt Krynicki | Łukasz Dębowski | Marcin Woliński | Daniel Janus | Piotr Bański
Proceedings of the Fourth International Conference on Language Resources and Evaluation (LREC’04)

2003

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The Unberable Lightness of Tagging* A Case Study in Morphosyntactic Tagging of Polish
Adam Przepiórkowski | Marcin Woliński
Proceedings of 4th International Workshop on Linguistically Interpreted Corpora (LINC-03) at EACL 2003

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A Flexemic Tagset for Polish
Adam Przepiórkowski | Marcin Woliński
Proceedings of the 2003 EACL Workshop on Morphological Processing of Slavic Languages

2000

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An HPSG-Annotated Test Suite for Polish
Malgorzata Marciniak | Agnieszka Mykowiecka | Anna Kupść | Adam Przepiórkowski
Proceedings of the Second International Conference on Language Resources and Evaluation (LREC’00)

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