From left, Andrew Arruda, Akash Venkat, Pargles Dall’Oglio, Jimoh Ovbiagele and Shuai Wang developed an artificially intelligent legal researcher named ROSS. (Kevin Van Paassen For The Globe and Mail)

A class project-turned-startup launched by University of Toronto students that uses IBM’s artificially intelligent Watson computer to do legal research now has backing from Dentons, the world’s largest law firm.