And ( Glickman and Dagan , 2003 ) use clustering and similarity measures to identify similar contexts in a single corpus and extract verbal paraphrases from these contexts .
identifying lexical paraphrases from a single corpus a case study for verbs
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Similarly , ( Barzilay and Lee , 2003 ) and ( Shinyanma et al. , 2002 ) learn sentence level paraphrase templates from a corpus of news articles stemming from different news source . And ( Glickman and Dagan , 2003 ) use clustering and similarity measures to identify similar contexts in a single corpus and extract verbal paraphrases from these contexts . Such machine learning approaches have known pros and cons .
And ( @@CITATION ) use clustering and similarity measures to identify similar contexts in a single corpus and extract verbal paraphrases from these contexts .