10. The media of claim 8 , wherein the confidence score for each of the one or more of the identified nodes is determined based on whether the identified node and the user have communicated with each other within a predetermined time period.
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; determine, by the one or more processors, a confidence score for each of the one or more of the identified nodes, the confidence score indicating a relative likelihood that the identified node matches the entity, wherein the confidence score is based in part on an interaction between the entity and a test message sent to the entity; and update, by the one or more processors, at least one of the identified nodes with at least one of the data items.