7. The non-transitory computer-readable storage medium of claim 6 , the operation further comprising: storing each time line series associatively with each corresponding topically related segment in the data storage.
7. The non-transitory computer-readable storage medium of claim 6 , the operation further comprising: storing each time line series associatively with each corresponding topically related segment in the data storage. 8. The non-transitory computer-readable storage medium of claim 7 , the operation further comprising: receiving a query specifying a first topic and a first speaker; retrieving at least one cluster group based on the set of properties of the at least one cluster group matching the first topic; retrieving a first speaker group based on the presenter of the first speaker group matching the first speaker; and returning the at least one cluster group and the first speaker group as responsive to the query.