Zero-Anaphora Resolution in Chinese Using Maximum Entropy

Jing PENG  Kenji ARAKI  

IEICE TRANSACTIONS on Information and Systems   Vol.E90-D   No.7   pp.1092-1102
Publication Date: 2007/07/01
Online ISSN: 1745-1361
DOI: 10.1093/ietisy/e90-d.7.1092
Print ISSN: 0916-8532
Type of Manuscript: PAPER
Category: Natural Language Processing
zero-anaphora resolution,  Web-based features,  maximum entropy,  classifier,  

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In this paper, we propose a learning classifier based on maximum entropy (ME) for resolving zero-anaphora in Chinese text. Besides regular grammatical, lexical, positional and semantic features motivated by previous research on anaphora resolution, we develop two innovative Web-based features for extracting additional semantic information from the Web. The values of the two features can be obtained easily by querying the Web using some patterns. Our study shows that our machine learning approach is able to achieve an accuracy comparable to that of state-of-the-art systems. The Web as a knowledge source can be incorporated effectively into the ME learning framework and significantly improves the performance of our approach.