8. One or more computer-readable non-transitory storage media embodying software that is operable when executed to: receive a plurality of data items imported into a social-networking system by a first user of the social-networking system, the plurality of data items being related to an entity; access, by one or more processors associated with one or more computer servers associated with the social-networking system, one or more data stores storing a social graph of the social-networking system, the social graph comprising a plurality of nodes and a plurality of edges between nodes, the nodes comprising user nodes corresponding to users of the social-networking system and concept nodes corresponding to concepts; identify, by the one or more processors, one or more nodes of the social graph that likely match the entity, each of the one or more nodes having at least one matching attribute that matches one of the plurality of data items; and update, by the one or more processors, an unmatched attribute, different from the at least one matching attribute, of at least one of the identified nodes with at least one of the data items.
10. The media of claim 8 , wherein the data items comprise a cookie or token associated with a user of the social-networking system.