Systems and methods that identify and extract information from articles are described. In one embodiment, a search engine implements a method comprising capturing an event in real time upon the occurrence of the event, wherein the event comprises a user interaction with an article on a client device, wherein the article is capable of being associated with at least one of a plurality of client applications, determining if the event should be indexed, and if the event should be indexed, indexing the event and storing the event and at least a portion of content associated with the article.