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 "Kelly Pavlik"): He won the unified WBC, WBO, "Ring" magazine and lineal middleweight titles by defeating Jermain Taylor in 2007, and made three successful defenses before losing them to Sergio Martínez in 2010.
Relevant evidence: Yes