The Proposition Bank: An Annotated Corpus of Semantic Roles. Palmer, M., Gildea, D., & Kingsbury, P. Computational Linguistics, 31(1):71-106, MIT Press, 2005.
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The Proposition Bank project takes a practical approach to semantic representation, adding a layer of predicate-argument information, or semantic role labels, to the syntactic structures of the Penn Treebank. The resulting resource can be thought of as shallow, in that it does not represent coreference, quantification, and many other higher-order phenomena, but also broad, in that it covers every instance of every verb in the corpus and allows representative statistics to be calculated.

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