Accurate Unlexicalized Parsing
Klein & Manning, 2003, Accurate Unlexicalized Parsing (Proceedings of the 41st Annual Meeting of ACL)
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7 Head Annotation
- What do POSS-NP and SPLIT-VP mark, and why?POSS-NP marks possessive NPs, which have a very different distribution (NP → NP α is only used with a possessive left child). SPLIT-VP marks VPs with their head tag, merging finite forms into VBF, so finite and infinitival VPs differ (present-tense verbs rarely take bare infinitive complements). SPLIT-VP gave +2.66 F1, more than in isolation.
- Klein & Manning, 2003, Accurate Unlexicalized Parsing (Proceedings of the 41st Annual Meeting of ACL), §7, p. 429
Source
- Dan Klein and Christopher D. Manning. 2003. Accurate Unlexicalized Parsing. In Proceedings of the 41st Annual Meeting of the Association for Computational Linguistics, pp. 423–430. https://aclanthology.org/P03-1054/