20. The device of claim 13 , the set of instructions stored in the storage device further include instructions executable by the at least one processor for determining one or more breaking topics.
20. The device of claim 13 , the set of instructions stored in the storage device further include instructions executable by the at least one processor for determining one or more breaking topics. 21. The device of claim 20 wherein determining one or more breaking topics is based on a comparison of (i) the revised set of topics for the second level of popularity, calculated at a first time period, and (ii) a revised set of topics for the second level of popularity at a second time period.