Complex sentence: Roberto Clemente Walker (August 18,1934--December 31,1972) was a Puerto Rican Major League Baseball (MLB) right fielder who played 18 seasons for the Pittsburgh Pirates from 1955 through 1972.
Split into simpler sentences: Roberto Clemente Walker (August 18,1934--December 31,1972) was a Puerto Rican baseball player. Clemente was a Major League Baseball (MLB) right fielder who played 18 seasons for the Pittsburgh Pirates from 1955 through 1972.