16. The system of claim 15 , wherein the anchor further comprises a remainder of an adverbial relative clause modifying the named entity.
17. The system of claim 16 , the operations further comprising: counting the number of unique anchors associated with each identified potential paraphrase pair to determine the quality of each potential paraphrase pair; and identifying potential paraphrase pairs that are associated with a larger number of anchors as being of higher quality than potential paraphrase pairs that are associated with a smaller number of anchors.