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Syntactic Annotations for the Google Books NGram Corpus

Proceedings of the 50th Annual Meeting of the Association for Computational Linguistics, pages 169 174,Jeju, Republic of Korea, 8-14 July 2012 Association for Computational LinguisticsSyntactic Annotations for the Google Books NGram CorpusYuri Lin, Jean-Baptiste Michel, Erez Lieberman Aiden,Jon Orwant, Will Brockman and Slav Petrov Google present a new edition of the Google BooksNgram Corpus , which describes how oftenwords and phrases were used over a periodof five centuries, in eight languages; it reflects6% of all Books ever published. This new edi-tion introduces Syntactic Annotations : wordsare tagged with their part-of-speech, and head-modifier relationships are recorded.

the availability of syntactic annotations resolves the verb vs. adjective ambiguity in the original data, al-lowing us to only examine instances where burnt and burned appear as verbs. This more rened anal-ysis suggests a crossover date for the frequency of the verb forms that is several decades earlier than the overall (verbs and adjectives ...

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