1. A method of identifying a significant phrase in a document, the method comprising: reading a sequence of words from the document; determining a score for each word in the sequence based on the length of each word; comparing the score for each word in the sequence against a threshold score; indicating that the sequence of words is a significant phrase if the number of words in the sequence that have the score greater than the threshold score equals or exceeds a predetermined number; 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.