2. The concept-service component of claim 1 wherein the hardware processor requests a category ID and date or date/time indication that corresponds to the received content ID from a media-data-storage component of the content-search-service system.
2. The concept-service component of claim 1 wherein the hardware processor requests a category ID and date or date/time indication that corresponds to the received content ID from a media-data-storage component of the content-search-service system. 3. The concept-service component of claim 2 wherein the hardware processor requests an ontology and vocabulary from an ontology-store component of the content-search-service system, using the category ID and date or date/time indication and a transcript from an extracted-content-storage component using the received content ID.