<?xml version="1.0" standalone="yes"?>
<Paper uid="W05-0622">
  <Title>Semantic Role Labelling with Tree Conditional Random Fields</Title>
  <Section position="8" start_page="171" end_page="171" type="concl">
    <SectionTitle>
6 Conclusion
</SectionTitle>
    <Paragraph position="0"> Conditional random fields proved useful in modelling the semantic structure of text when provided with a parse tree. Our novel use of a tree structure derived from the syntactic parse, allowed for parent-child interactions to be accurately modelled, which provided an improvement over a standard maximum entropy classifier. In addition, the parse constituent structure proved quite appropriate to the task, more so than modelling the data as a sequence of words or chunks, as has been done in previous approaches.</Paragraph>
  </Section>
class="xml-element"></Paper>