1. A computer system, comprising: a processor; and storage coupled to the processor, wherein the storage stores a program, wherein the processor executes the program to perform operations, wherein the operations comprise: forming a set of anchors that point to a target document, wherein each anchor is a path from a source document to the target document; grouping together anchors with same anchor text, wherein each anchor is associated with anchor text; computing a relevance score for each group, wherein computing the relevance score includes computing a linguistic score for each group; and generating context information for the target document based on the computed relevance score, wherein a title is composed from text of a group with a highest relevance score and a summary of the target document is composed from anchor texts of a number of groups with highest relevance scores.