16. A system comprising: a memory to store a keyword list associated with a category of media items; and one or more processors to: obtain a search query, identify candidate queries for the search query, determine whether the candidate queries match words in the keyword list, determine a first ratio based on a first quantity of times that the search query is submitted to a web search engine interface, determine a second ratio based on a second quantity of times that the search query is submitted to a specialized search engine interface that is used to search for information associated with the category or to search for information associated with news, identify, based on the first ratio and the second ratio, the search query as a media query associated with the category when the candidate queries match one or more of the words in the keyword list, and provide, based on identifying the search query as the media query, a result document based on the media query.
16. A system comprising: a memory to store a keyword list associated with a category of media items; and one or more processors to: obtain a search query, identify candidate queries for the search query, determine whether the candidate queries match words in the keyword list, determine a first ratio based on a first quantity of times that the search query is submitted to a web search engine interface, determine a second ratio based on a second quantity of times that the search query is submitted to a specialized search engine interface that is used to search for information associated with the category or to search for information associated with news, identify, based on the first ratio and the second ratio, the search query as a media query associated with the category when the candidate queries match one or more of the words in the keyword list, and provide, based on identifying the search query as the media query, a result document based on the media query. 17. The system of claim 16 , where, when determining whether the candidate queries match the words in the keyword list, the one or more processors are further to: determine a sum of values associated with one or more of the words in the keyword list that match one or more words included in the candidate queries, and determine that the candidate queries match the words in the keyword list when the sum of the values is greater than a threshold.