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Building a Lexical Knowledge-Base of Near-Synonym Differences (Paperback)
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Building a Lexical Knowledge-Base of Near-Synonym Differences (Paperback)
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Current natural language generation or machine translation systems
cannot distinguish among near-synonyms - words that share the same
core meaning but vary in their lexical nuances. This is due to a
lack of knowledge about differences between near-synonyms in
existing computational lexical resources. In this work, I
automatically acquired a lexical knowledge-base of near-synonym
differences from multiple sources, using an unsupervised decision-
list algorithm. The main types of differences are: stylistic (for
example, "inebriated" is more formal than "drunk"), attitudinal
(for example, "skinny" is more pejorative than "slim"), and
denotational (for example, "blunder" implies "accident" and
"ignorance," while "error" does not). To show how the
knowledge-base can be used in practice, I designed Xenon, a natural
language generation system system that chooses the near-synonym
that best matches a set of input preferences. I implemented Xenon
by adding a near-synonym choice module and a near-synonym
collocation module to an existing general-purpose surface realizer.
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