1. A method implemented by one or more processors, comprising: identifying a particular entity, the particular entity being a particular person, place, or thing; identifying a plurality of search queries that are each associated with the particular entity; determining a query score for each of the search queries, wherein the query score for a search query of the search queries is based on entity ambiguity of the search query, wherein the entity ambiguity of the search query is based on a comparison of a quantity of search result documents, for the search query, that describe the particular entity to a quantity of the search result documents, for the search query, that do not describe the particular entity; assigning a particular search query of the search queries to the particular entity based on the determined query scores; receiving input, the input being provided via a user interface input device of a client computing device; determining that the particular entity is associated with the input; providing, for presentation via a user interface output device of the client computing device, content that includes a name of the particular entity and one or more additional properties of the particular entity, wherein providing the content is in response to the input and is in response to determining that the particular entity is associated with the input; and in response to selection of the content at the client computing device, submitting the particular search query to a search engine based on the particular search query being assigned to the particular entity.