26. The computer program product of claim 16 wherein: the information of the first type corresponds to video information; and the first representation of the information of the first type comprises one or more video keyframes extracted from the video information.
26. The computer program product of claim 16 wherein: the information of the first type corresponds to video information; and the first representation of the information of the first type comprises one or more video keyframes extracted from the video information. 28. The computer program product of claim 26 wherein: the information of the second type corresponds to closed-caption (CC) text information; and the first representation of information of the second type comprises text information included in the CC text information.