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Table 1 Statistics of bio-event corpora containing polarity information

From: Negated bio-events: analysis and identification

Corpus Event types Total events Negated events Negation percentage
GENIA Event 36 36,858 2,351 6.4%
BioInfer 60 2,662 163 6.1%
BioNLP’09 Shared Task 9 11,480 722 6.3%