Complex sentence: Héctor J. Costa Massironi (July 30,1929--May 23,2010) was a basketball player from Uruguay, who twice won the bronze medal with the men's national team at the Summer Olympics: in 1952 and 1956.
Split into simpler sentences: Héctor J. Costa Massironi (July 30,1929--May 23,2010) was a basketball player from Uruguay. He won twice the bronze medal with the men's national team at the Summer Olympics: in 1952 and 1956.