4. The method of claim 3 wherein the author inserts the second topic tag into the one of the plurality of instant messaging statements to change the first topic to a second topic.
3. The method of claim 1 further comprising: wherein the statement classification method is by an author of an instant messaging statement, the author being one of a plurality of participants in an instant messaging session; the computer associating the instant messaging statement with a first topic by inserting a first topic tag into the instant messaging statement; the computer associating a plurality of subsequent instant messaging statements with the first topic; and the computer ending an association of the plurality of subsequent instant messaging statements with the first topic by inserting a second topic tag into one of the plurality of subsequent instant messaging statements.