At step 406, the message processing system 230 may determine whether two or more of the communication sessions between the first user and other users share a common ground based on the similarity determined at step 404. Prior discussions in connection with the step 324 may be applied to step 406. For example, if the two or more of the communication sessions have high similarity, the message processing system 230 may determine the two or more of the communication sessions share a common ground. And the process may then proceed to step 408. If the two or more of the communication sessions do not have high similarity, the message processing system 230 may determine the two or more of the communication sessions do not share a common ground. And the process may return to step 404 where the message processing system 230 continues to monitor communication sessions associated with the first user.

At step 408, the message processing system 230 may determine whether other users involved in the two or more of the communication sessions (sharing a common ground) are related to each other. Prior discussions in connection with the steps 326 and 328 may be applied to step 408. If it is determined that the other users are related to each other, the process may proceed to step 410. Otherwise, the process may return to step 404 where the message processing system 230 continues to monitor communication sessions associated with the first user.