Question: The Orthodox stance was used by the last boxer in what weight class to hold the undisputed champion title?
Sentence (from "Evander Holyfield"): Holyfield is the only four-time world heavyweight champion, having held the WBA, WBC, IBF, and lineal titles from 1990 to 1992; the WBA, IBF, and lineal titles again from 1993 to 1994; the WBA title from 1996 to 1999; the IBF title from 1997 to 1999; and the WBA title for a fourth time from 2000 to 2001.
Relevant evidence: No