13. A recommender system for associating a second media content item with a first media content item, wherein the first media content item comprises a first audio/video content and the second media content item comprises a second audio/video content, the recommender system comprising: a network interface configured for receiving a map of a first delimited segment of the first media content item, the map comprising a first sentiment-state keyword associated with the first segment and a first temporal delimitation of the first segment, and for receiving a map of a second delimited segment of the second media content item, the map comprising a second sentiment-state keyword associated with the second segment and a second temporal delimitation of the second segment; and a processor operatively connected to the network interface, the processor configured for: comparing the maps of the first and second delimited segments; and if a result of the comparison is a favorable result for a temporal extent associated with the first and second temporal delimitations, then associating the second media content item with the first media content item.
13. A recommender system for associating a second media content item with a first media content item, wherein the first media content item comprises a first audio/video content and the second media content item comprises a second audio/video content, the recommender system comprising: a network interface configured for receiving a map of a first delimited segment of the first media content item, the map comprising a first sentiment-state keyword associated with the first segment and a first temporal delimitation of the first segment, and for receiving a map of a second delimited segment of the second media content item, the map comprising a second sentiment-state keyword associated with the second segment and a second temporal delimitation of the second segment; and a processor operatively connected to the network interface, the processor configured for: comparing the maps of the first and second delimited segments; and if a result of the comparison is a favorable result for a temporal extent associated with the first and second temporal delimitations, then associating the second media content item with the first media content item. 14. The system of claim 13 , wherein the first and the second media content items are selected from the group consisting of: a movie, a television program, a radio program, a segment of video, a segment of audio, a song, a music video, a personal message comprising audio/video content, a public-service message comprising audio/video content, a service alert comprising audio/video content, a health-service recommendation comprising audio/video content, a web page comprising audio/video content, an e-mail message comprising audio/video content, and a telephone call comprising audio/video content.