Complex sentence: Iván Ernesto Pérez Vargas (born June 29,1971 in Havana) is a water polo player from Spain, who was born in Cuba, but became a Spanish citizen.
Split into simpler sentences: Iván Ernesto Pérez Vargas (born June 29,1971 in Havana) is a water polo player from Spain. He was born in Cuba, but became a Spanish citizen.