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<Paper uid="P05-2019">
  <Title>A corpus-based approach to topic in Danish dialog[?]</Title>
  <Section position="2" start_page="0" end_page="0" type="abstr">
    <SectionTitle>
Abstract
</SectionTitle>
    <Paragraph position="0"> We report on an investigation of the pragmatic category of topic in Danish dialog and its correlation to surface features of NPs. Using a corpus of 444 utterances, we trained a decision tree system on 16 features. The system achieved near-human performance with success rates of 84-89% and F1-scores of 0.63-0.72 in 10-fold cross validation tests (human performance: 89% and 0.78). The most important features turned out to be preverbal position, definiteness, pronominalisation, and non-subordination. We discovered that NPs in epistemic matrix clauses (e.g. &amp;quot;I think . . . &amp;quot;) were seldom topics and we suspect that this holds for other inter-personal matrix clauses as well.</Paragraph>
  </Section>
class="xml-element"></Paper>