Question: Sparring with Hemingway was a book that included bouts with the undisputed champion of what weight class from 1980 to 1987?
Sentence (from "Marvelous Marvin Hagler"): At six years and seven months, his reign as undisputed middleweight champion is the second longest of the last century, behind only Tony Zale, who reigned during World War II.
Relevant evidence: No