9. A system according to claim 1 , further comprising: an identification module to identify one of the links selected by a user; and to present at least one of the messages that is communicated between the sender and the recipient connected by the identified link.
9. A system according to claim 1 , further comprising: an identification module to identify one of the links selected by a user; and to present at least one of the messages that is communicated between the sender and the recipient connected by the identified link. 10. A system according to claim 9 , further comprising: a presentation module to present the concepts included in the identified messages.