15. A system comprising: one or more processors; and a memory coupled to the processors comprising instructions executable by the processors, the processors operable when executing the instructions to: receive a plurality of data items associated with 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 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 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 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.
15. A system comprising: one or more processors; and a memory coupled to the processors comprising instructions executable by the processors, the processors operable when executing the instructions to: receive a plurality of data items associated with 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 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 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 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. 19. The system of claim 15 , wherein the identification of one or more nodes of the social graph that likely match the entity is further based on a respective measure of affinity between the nodes and the first user.