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Anaphoric annotation and corpus-based anaphora resolution: An experiment
Компьютерная лингвистика и интеллектуальные технологии. 2014. P. 562–571.
Alexeeva S. V., Protopopova E. V., Bodrova A. A., Volskaya S. A., Krylova I. V., Chuchunkov A. S., Granovsky D. V., Bocharov V. V.
The paper describes the noun phase and anaphora annotation in OpenCorpora and compares it to that in other corpora. We discuss the choice of representative texts for anaphoric annotation and the basic principles of syntactic annotation. In case of noun phrase annotation we followed the scheme introduced earlier for morphological annotation: it was carried out in two stages: firstly, all noun phrases and some other syntactic units were annotated by a heterogenous group of people, then a linguist compared all markup results and found the best one, or corrected mistakes. We present some annotation results and cases of annotator's disagreement and proceed to introduce our data-driven anaphora resolution system based on decision trees. We then list the features used to fit the classificator and discuss their relevance and some changes which improved the classificator performance. We also present out rule-based approach to automated noun phrase extraction using Tomita parser. A baseline for anaphora resolution is introduced and we compare it with our results.
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