1. A computer-implemented method for detecting inferences from documents, wherein the computer includes a processor, the method comprising: receiving one or more documents; extracting a first set of knowledge relevant to the documents; formulating one or more queries to one or more reference corpora based on the first set of knowledge; extracting a second set of knowledge from results received in response to the queries; and detecting an inference by producing a mapping relationship between at least one document and a piece of the second set of knowledge which is not within the first set of knowledge, wherein the mapping relationship indicates an inference from the documents.
1. A computer-implemented method for detecting inferences from documents, wherein the computer includes a processor, the method comprising: receiving one or more documents; extracting a first set of knowledge relevant to the documents; formulating one or more queries to one or more reference corpora based on the first set of knowledge; extracting a second set of knowledge from results received in response to the queries; and detecting an inference by producing a mapping relationship between at least one document and a piece of the second set of knowledge which is not within the first set of knowledge, wherein the mapping relationship indicates an inference from the documents. 9. The method of claim 1 , wherein producing the mapping relationship comprises presenting one or more words or phrases from the documents, which words or phrases correspond to the first set of knowledge, and one or more sensitive words or phrases extracted from the query results.