1. A method comprising: retrieving information describing media available in a media content retrieval system, to yield retrieved information; constructing, via a processor device, a graph that models how the media are interconnected based on the retrieved information, the graph interconnecting disparate categories of the media; weighting the graph based on the retrieved information, to yield a weighted graph; normalizing the weighted graph, to yield a normalized weighted graph; ranking the retrieved information describing the media based on the normalized weighted graph, to yield ranked information; and generating, via the processor device, a speech recognition model based on the ranked information.