... The main processing stages are the acquisition of contextual extraction patternsgiven the seed facts, acquisition of candidate factsgiven the extraction patterns, scoring and ranking of the patterns, ... outerboundaries of the fact are computed separately for the beginning of the first (left) and end of the sec-ond (right) phrases of the candidate fact. For gen-erality, the computation relies only on the ... How-ever, the matching of the part -of- speech tags of the sentence sequences to the left and right of the in- fix, against the part -of- speech tags of the seed fact,only succeeds for the last three...