Mengdi Wang


2019

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Towards Coherent and Cohesive Long-form Text Generation
Woon Sang Cho | Pengchuan Zhang | Yizhe Zhang | Xiujun Li | Michel Galley | Chris Brockett | Mengdi Wang | Jianfeng Gao
Proceedings of the First Workshop on Narrative Understanding

Generating coherent and cohesive long-form texts is a challenging task. Previous works relied on large amounts of human-generated texts to train neural language models. However, few attempted to explicitly improve neural language models from the perspectives of coherence and cohesion. In this work, we propose a new neural language model that is equipped with two neural discriminators which provide feedback signals at the levels of sentence (cohesion) and paragraph (coherence). Our model is trained using a simple yet efficient variant of policy gradient, called ‘negative-critical sequence training’, which is proposed to eliminate the need of training a separate critic for estimating ‘baseline’. Results demonstrate the effectiveness of our approach, showing improvements over the strong baseline – recurrent attention-based bidirectional MLE-trained neural language model.