Question: The Curse of Rocky Colavito is one of several sports superstitions centered on the failure to win a championship in any major league sport for how many years?
Sentence (from "Cleveland sports curse"): Three major league teams based in Cleveland contributed to belief in the curse: the Browns of the National Football League (NFL); the Cavaliers of the National Basketball Association (NBA); and the Indians of Major League Baseball (MLB).
Relevant evidence: No