As described above, our final version of the QA system ranks summary extracts according to both their vector space similarity to the question as well as linguistic evidence that the answer lies within the extract.
each summary extract E for question q is ranked according to a new score, Sq: The intuition behind the new score is to prefer summary extracts that exhibit the same linguistic relationships as the question (as indicated by LRq) and to give more weight (as indicated by w) to linguistic relationship matches in extracts from higher-ranked documents.