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<Paper uid="P04-3017">
  <Title>Finding Anchor Verbs for Biomedical IE Using Predicate-Argument Structures</Title>
  <Section position="5" start_page="0" end_page="0" type="concl">
    <SectionTitle>
5 Conclusions
</SectionTitle>
    <Paragraph position="0"> We have proposed a method of extracting anchor verbs as elements of extraction rules for IE by using PASs obtained by full parsing. To compare our method with more naive and robust methods, we have extracted verbs and their arguments using POS patterns and PASs. POS pattern method could obtain more candidate verbs for anchor verbs, but many of them were extracted with incorrect arguments by incorrect matching. A later filtering process benefits by precise relations between verbs and their arguments which PASs obtained. The shortcoming of PAS method is expected to be reduced by using a larger corpus, because verbs to extract will appearmanytimesinmanyforms. Oneofthefuture works is to extend PAS method to handle events in nominalized forms.</Paragraph>
  </Section>
class="xml-element"></Paper>