Complex sentence: Raúl Márquez (born August 28,1971 in Valle Hermoso, Tamaulipas) is an American boxer who represented the United States in the 1992 Summer Olympic Games in Barcelona, Spain and an IBF Jr. Middleweight Champion.
Split into simpler sentences: Raúl Márquez (born August 28,1971 in Valle Hermoso, Tamaulipas) is an American boxer. He represented the United States in the 1992 Summer Olympic Games in Barcelona, Spain and an IBF Jr. Middleweight Champion.