8. The method of claim 1 , wherein receiving the submission comprises receiving a selection by the first user of a first checkbox of a plurality of presented checkboxes, each checkbox corresponding to a particular subpopulation of users of the plurality of subpopulations of users of the search engine, the first checkbox corresponding to the first subpopulation of users.
9. The method of claim 8 , further comprising: receiving the first query from the first user; and providing a first search results page to the first user, the first search results page including a user interface for receiving user input of text, and wherein receiving the submission of the first resource locator for the first alternative search result comprises receiving user input of text by the first user in the user interface of the first search results page.