A Statistical, Grammar-Based Approach to Microplanning

Claire Gardent, Laura Perez-beltrachini

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Although there has been much work in recent years on data-driven natural language generation, little attention has been paid to the fine-grained interactions that arise during microplanning between aggregation, surface realization, and sentence segmentation. In this article, we propose a hybrid symbolic/statistical approach to jointly model the constraints regulating these interactions. Our approach integrates a small handwritten grammar, a statistical hypertagger, and a surface realization algorithm. It is applied to the verbalization of knowledge base queries and tested on 13 knowledge bases to demonstrate domain independence. We evaluate our approach in several ways. A quantitative analysis shows that the hybrid approach outperforms a purely symbolic approach in terms of both speed and coverage. Results from a human study indicate that users find the output of this hybrid statistic/symbolic system more fluent than both a template-based and a purely symbolic grammar-based approach. Finally, we illustrate by means of examples that our approach can account for various factors impacting aggregation, sentence segmentation, and surface realization.
Original languageEnglish
Pages (from-to)1-30
Number of pages30
JournalComputational Linguistics
Volume43
Issue number1
DOIs
Publication statusPublished - 5 Apr 2017

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