4. The method of claim 3 , wherein: the set of data further comprises a set of images; and wherein a particular association score between a particular visual word in the set of visual words and a particular linguistic word in the set of linguistic words accounts for whether or not the particular visual word occurs in an image described by the particular linguistic word.
3. The method of claim 1 , further comprising: constructing a set of connections between the first set of nodes and the second set of nodes; wherein each connection in the set of connections connects a node in the first set of nodes and a node in the second set of nodes if there is an association between the linguistic word represented by the node in the first set of nodes and the visual word represented by the node in the second set of nodes; wherein each connection in the set of connections comprises a first directed edge and a second directed edge; wherein the first directed edge is directed from the node in the first set of nodes to the node in the second set of nodes; wherein the second directed edge is directed from the node in the second set of nodes to the node in the first set of nodes; wherein the first directed edge is labeled with a first probability; wherein the first probability indicates a probability that the visual word represented by the node in the second set of nodes occurs in any image in the set of images described by the linguistic word represented by the node in the first set of nodes; wherein the second directed edge is labeled with a second probability; wherein the second probability indicates a probability that the linguistic word represented by the node in the first set of nodes describes any image in the set of images in which the visual word represented by the node in the second set of nodes occurs; wherein the random walk, with one or more restarts from the first node, through the bipartite graph is performed based on probabilities labeled on directed edges in connections between nodes in the first set of nodes and nodes in the second set of nodes, wherein the one or more restarts at the first node are based on a restart probability.