17. The method according to claim 16 , further comprising: retrieving a sentence from the document, the sentence containing the sequence of words, if the sequence of words is a significant phrase; and searching an abstract of the document to determine whether the sentence is included in the abstract.
17. The method according to claim 16 , further comprising: retrieving a sentence from the document, the sentence containing the sequence of words, if the sequence of words is a significant phrase; and searching an abstract of the document to determine whether the sentence is included in the abstract. 19. The method according to claim 17 , further comprising discarding the sentence if the sentence is included in the abstract.