Complex sentence: He won the Bronze medal in the 10,000 metres at the 1976 Summer Olympics, the 5,000 metres at the 1974 European Championships and the 10,000 metres at the 1978 Commonwealth Games.
Split into simpler sentences: He won the Bronze medal in the 10,000 metres at the 1976 Summer Olympics. He also won the 5,000 metres at the 1974 European Championships and the 10,000 metres at the 1978 Commonwealth Games.