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Line 6: === Multiple sequence alignment === Barzilay and Lee<ref name=Barzilay>{{cite conference\|last1=Barzilay\|first1=Regina\|last2=Lee\|first2=Lillian\|title=Learning to Paraphrase: An Unsupervised Approach Using Multiple-Sequence Alignment\|conference=Proceedings of HLT-NAACL 2003\|date=May–June 2003\|url=~~http~~https://www.cs.cornell.edu/home/llee/papers/statpar.home.html}}</ref> proposed a method to generate paraphrases through the usage of monolingual [[parallel text\|parallel corpora]], namely news articles covering the same event on the same day. Training consists of using [[multiple sequence alignment\|multi-sequence alignment]] to generate sentence-level paraphrases from an unannotated corpus. This is done by * finding recurring patterns in each individual corpus, i.e. "{{mvar\|X}} (injured/wounded) {{mvar\|Y}} people, {{mvar\|Z}} seriously" where {{mvar\|X, Y, Z}} are variables * finding pairings between such patterns the represent paraphrases, i.e. "{{mvar\|X}} (injured/wounded) {{mvar\|Y}} people, {{mvar\|Z}} seriously" and "{{mvar\|Y}} were (wounded/hurt) by {{mvar\|X}}, among them {{mvar\|Z}} were in serious condition"

Paraphrasing (computational linguistics): Difference between revisions