This lecture covered some of the work presented in “Mining Social Network in Message Boards” (the paper PDF may be found here (1Mb)) published in the Sympposium on Conversational Informatics for Supporting Social Intelligence and Interaction (AISB’05, 12-15 April, Hatfield, UK, 2005). The lecture covered how to identify relevant topic and player in an ongoing discussion. You can download the PDF here (2Mb)—or see below.