1. A system comprising: a processor of a machine; a social graph module to access a social graph of a subject user, the social graph comprising a plurality of nodes, the plurality of nodes including a focal node representing the subject user, a remainder of the plurality of nodes each representing one or more objects having a relationship with the subject user; a relevance module to determine that a particular node lacks relevance to the subject user; and an elimination module to eliminate the relationship of the subject user with the particular node in response to determining that the particular node lacks relevance to the subject user.