Question: Kelly Robert Pavlik (born April 5, 1982) is an American former professional boxer who competed from 2000 to 2012, he made three successful title defenses before losing them to which Argentine former professional boxer, who competed from 1997 to 2014?
Sentence (from "Sergio Martínez (boxer)"): He held the unified WBC, WBO, "Ring" magazine, and lineal middleweight titles between 2010 and 2014, making six successful defenses of the latter two titles.
Relevant evidence: No