Brutus: A Semantic Role Labeling System Incorporating CCG, CFG, and Dependency Features

@inproceedings{Boxwell2009BrutusAS,
  title={Brutus: A Semantic Role Labeling System Incorporating CCG, CFG, and Dependency Features},
  author={Stephen A. Boxwell and Dennis Mehay and Chris Brew},
  booktitle={ACL/IJCNLP},
  year={2009}
}
We describe a semantic role labeling system that makes primary use of CCG-based features. Most previously developed systems are CFG-based and make extensive use of a treepath feature, which suffers from data sparsity due to its use of explicit tree configurations. CCG affords ways to augment treepathbased features to overcome these data sparsity issues. By adding features over CCG wordword dependencies and lexicalized verbal subcategorization frames (“supertags”), we can obtain an F-score that… CONTINUE READING
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