Question: What was the unofficial name of the event that caused the man who defeated the great John L. Sullivan to rescind his retirement after hearing of the outcome?
Sentence (from "Fitzsimmons-Maher Prizefight"): Fitzsimmons was victorious, knocking Maher out in the first round; however, upon hearing of the outcome of the fight, the 1895 World Heavyweight Champion James J. Corbett immediately rescinded his retirement.
Relevant evidence: No