7. The method of claim 1 , wherein N denotes a total number of concepts of the one or more concepts in the first combination, and wherein N is at least 2.
7. The method of claim 1 , wherein N denotes a total number of concepts of the one or more concepts in the first combination, and wherein N is at least 2. 9. The method of claim 7 , wherein the first interest value is linearly proportional to N.