2. A method according to claim 1 , wherein said selecting selects the concepts with the highest frequencies which are higher by a pre-selected percentage than any other frequency in the vector.
2. A method according to claim 1 , wherein said selecting selects the concepts with the highest frequencies which are higher by a pre-selected percentage than any other frequency in the vector. 3. A method according to claim 2 , wherein said pre-selected percentage is greater than 10%.