39. The system according to claim 37 , further comprising a reformulation engine adapted to reformulate the query based on the contribution of the at least one identifying characteristic.
39. The system according to claim 37 , further comprising a reformulation engine adapted to reformulate the query based on the contribution of the at least one identifying characteristic. 40. The system according to claim 39 , wherein the reformulation engine is further adapted to repeat the reformulation of the query for each identifying characteristic.