Upon entering Canterbury Commons you will witness a fight between the Mechanist and the AntAgonizer. Once it finishes, you will be approached by a man named Uncle Roe who will ask you to help stop them from coming around, the only option seeming to be killing one of them. You can head north to kill the Ant lady or south to kill the robot dude. Alternatively, you can use a high Speech skill to convince them to either leave town or give up their careers. Whichever method you choose, return to Uncle Roe to claim your reward.
See The Superhuman Gambit for more specific info.