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<Paper uid="W03-1601">
  <Title>Generation of single-sentence paraphrases from predicate#2Fargument structure using lexico-grammatical resources</Title>
  <Section position="2" start_page="0" end_page="1" type="intro">
    <SectionTitle>
1 Introduction
</SectionTitle>
    <Paragraph position="0"> In natural language generation, producing some realization of the input semantics is not the only goal. The same meaning can often be expressed in various ways using di#0Berent lexical and syntactic means. These di#0Berent realizations, called paraphrases, vary considerably in appropriateness based on pragmatic factors and communicative goals. If a generator is to come up with the most appropriate realization, it must be capable of generating all paraphrases that realize the input semantics. Even if it makes choices on pragmatic grounds during generation and produces a single realization, the ability to generate them all must still exist.</Paragraph>
    <Paragraph position="1"> Variety of lexical and grammatical forms of expression pose challenges to a generator #28#28Stede, 1999#29; #28Elhadad et al., 1997#29; #28Nicolov et al., 1995#29#29. In this paper, we discuss the generation of single-sentence paraphrases realizing the same semantics in a uniform fashion using a simple sentence generation architecture.</Paragraph>
    <Paragraph position="2"> In order to handle the various ways of realizing meaning in a simple manner, we believe that the generation architecture should not be aware of the variety and not have any special mechanisms to handle the di#0Berent types of realizations null  . Instead, we want all lexical and grammatical variety to follow automatically from the variety of the elementary building blocks of generation, lexico-grammatical resources.</Paragraph>
    <Paragraph position="3"> We have developed a fully-operational prototype of our generation system capable of generating the examples presented in this paper, which illustrate a wide range of paraphrases.</Paragraph>
    <Paragraph position="4"> As we shall see, the paraphrases that are produced by the system depend entirely on the actual lexicon used in the particular application. Determining the range of alternate forms that constitute paraphrases is not the focus of this work. Instead, we describe a framework in which lexico-grammatical resources, if properly de#0Cned, can be used to generate paraphrases.</Paragraph>
  </Section>
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