Related entities

Abstract

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for identifying entities that are related to an entity to which a search query is directed. One of the methods includes receiving a search query, wherein the search query has been determined to relate to a first entity of a first entity type, and wherein one or more entities of a second entity type have a relationship with the first entity; receiving search results for the search query; determining that a count of search results identifying a resource containing a reference to the first entity satisfies a first threshold value; determining that a count of search results identifying a resource having the second entity type as a relevant entity type satisfies a second threshold value; and transmitting information identifying the one or more entities of the second entity type as part of the response to the search query.

1 . A method performed by one or more computers, the method comprising:
 obtaining data identifying a first entity of a first entity type;   identifying a plurality of second entities of the first entity type that are related to the first entity;   determining a respective ranking score for each of the second entities of the plurality of second entities of the first entity type;   ordering the second entities of the first entity type according to the ranking scores; and   generating a mapping from the first entity to each of the second entities based on the ordering of the second entities.