15. The computer-readable medium of claim 13 , wherein obtaining the seed keywords comprises issuing a query based on a sensitive topic to the corpus and extracting the seed keywords from a number of documents returned in response to the query.
13. A non-transitory computer-readable medium storing instructions which when executed by a computer cause the computer to perform a method for augmenting a privacy policy, the method comprising: obtaining a set of training documents and a seed keyword associated with the privacy policy; extracting a candidate keyword from the training documents; issuing at least one query comprising the candidate keyword to a corpus; receiving a set of result documents; evaluating an inference strength between the candidate keyword and a respective seed keyword, wherein evaluating the inference strength comprises evaluating a ratio between the number of search hits from a query containing both the candidate keyword and the respective seed keyword, and the number of search hits from a query containing only the candidate keyword; determining that the evaluated inference strength is greater than a predetermined threshold ratio; responsive to the evaluated inference strength being greater than the predetermined threshold ratio, augmenting the privacy policy by associating the candidate keyword with the privacy policy; and applying the augmented privacy policy to a subject document to determine whether the subject document triggers the privacy policy, wherein applying the augmented privacy policy comprises searching the subject document for occurrences of any of the candidate keywords associated with the augmented privacy policy.