Complex sentence: He was killed during a pre-game warm-up in Ogden, Utah, on June 29,1951, when he was struck over the heart by a throw from Trower while distracted; he died within minutes of the impact.
Split into simpler sentences: He was killed during a pre-game warm-up on June 29,1951. Conway was struck over the heart by a throw from Trower while distracted; he died within minutes of the impact.