15. The method of claim 14 , further comprising the step of applying the ranking model to automatically learn to assess the tuples that are extracted in regard to the quality of the relationships of the tuples, to determine which tuples are to be retained.
15. The method of claim 14 , further comprising the step of applying the ranking model to automatically learn to assess the tuples that are extracted in regard to the quality of the relationships of the tuples, to determine which tuples are to be retained. 17. The method of claim 15 , wherein the step of automatically learning to assess comprises the steps of: (a) automatically labeling each relationship extracted from the training data as either positive or negative, producing labeled data; and (b) training an independent feature model using the labeled data, so that the independent feature model is used to determine the quality of the relationships indicated by the tuples, in regard to whether each of the relationships of the tuples extracted from the corpus of text is trustworthy or not trustworthy.