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<Paper uid="A00-1021">
  <Title>Ranking suspected answers to natural language questions using predictive annotation</Title>
  <Section position="2" start_page="0" end_page="0" type="abstr">
    <SectionTitle>
Abstract
</SectionTitle>
    <Paragraph position="0"> In this paper, we describe a system to rank suspected answers to natural language questions.</Paragraph>
    <Paragraph position="1"> We process both corpus and query using a new technique, predictive annotation, which augments phrases in texts with labels anticipating their being targets of certain kinds of questions.</Paragraph>
    <Paragraph position="2"> Given a natural language question, our IR system returns a set of matching passages, which we then rank using a linear function of seven predictor variables. We provide an evaluation of the techniques based on results from the TREC Q&amp;A evaluation in which our system participated. null</Paragraph>
  </Section>
class="xml-element"></Paper>