Table 2 

Primary feature groups used by the model. The third column gives the number of features in the group, and the final column gives the number of features from the group that were ranked in the top 20 among all features.

Feature group
Resources used
#
Top 20
(1) Textual semantics PropBank, NomBank 13 
(2) Ontologies FrameNet, VerbNet, WordNet 
(3) Filler-independent Penn TreeBank 35 
(4) Corpus statistics Gigaword, Verbal SRL, Nominal SRL 
(5) Textual discourse Penn Discourse Bank 
(6) Other Penn TreeBank 15 
Feature group
Resources used
#
Top 20
(1) Textual semantics PropBank, NomBank 13 
(2) Ontologies FrameNet, VerbNet, WordNet 
(3) Filler-independent Penn TreeBank 35 
(4) Corpus statistics Gigaword, Verbal SRL, Nominal SRL 
(5) Textual discourse Penn Discourse Bank 
(6) Other Penn TreeBank 15 
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