16. The computer system of claim 13 , wherein while extracting the first set of knowledge, the first knowledge extraction mechanism is configured to extract a set of words or phrases from each document; and wherein while formulating the queries, the query formulation mechanism is configured to construct single-word queries, multi-word queries, or both from the extracted words or phrases.
16. The computer system of claim 13 , wherein while extracting the first set of knowledge, the first knowledge extraction mechanism is configured to extract a set of words or phrases from each document; and wherein while formulating the queries, the query formulation mechanism is configured to construct single-word queries, multi-word queries, or both from the extracted words or phrases. 17. The computer system of claim 16 , wherein while constructing the queries, the query formulation mechanism is further configured to apply one or more pre-determined logical combinations of the extracted words or phrases, thereby formulating queries based on a number of words or phrases with logical relationships.