Complex sentence: Emilio Ulloa Valenzuela (born October 22,1952) is a retired male long-distance runner from Chile, who represented his native country at two consecutive Summer Olympics, starting in 1984.
Split into simpler sentences: Emilio Ulloa Valenzuela (born October 22,1952) is a retired male long-distance runner from Chile. He represented his native country at two consecutive Summer Olympics, starting in 1984.