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<Paper uid="N06-1055">
  <Title>Semantic Role Labeling of Nominalized Predicates in Chinese</Title>
  <Section position="7" start_page="436" end_page="437" type="concl">
    <SectionTitle>
6 Conclusion and future work
</SectionTitle>
    <Paragraph position="0"> We reported first results on the semantic role labeling of nominalized predicates in Chinese, using a sizable annotated corpus, the Chinese Nombank, as training and test data. Compared with that of verbal predicates, SRL of nominalized predicates generally presents a more challenging problem, for all experimental conditions. While the smaller training set compared with that of verbal predicates may provide partial explanation for the degradation in performance, we believe another important reason is that the arguments for nominalized predicates do not occupy prominent syntactic positions such as the subject and object, as arguments of verbal predicates often do. As a result, the syntactic structure represented in the parse tree does not provide as much of a clue for their detection and classification. However, this makes SRL of nominalized predicates a more pressing issue to solve, as they represent a substan- null tial proportion of the predicates in the corpus. Our results also show that the k-best propositions produced by the local classifier have a very high oracle score, which perhaps indicates a promising path that deserves further exploration, based on careful analysis of the errors. We intend to continue to experiment with new features and parameters for the reranking algorithm.</Paragraph>
  </Section>
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