Question: The Orthodox stance was used by the last boxer in what weight class to hold the undisputed champion title?
Sentence (from "Lennox Lewis"): Lennox Claudius Lewis, {'1': ", '2': ", '3': ", '4': "} , {'1': ", '2': ", '3': ", '4': "} (born 2 September 1965) is a former professional boxer who competed from 1989 to 2003.
Relevant evidence: No