Complex sentence: Yevgeny Ivanovich Lopatin (December 26,1917--July 21,2011) was a Soviet weightlifter who competed at the 1952 Summer Olympics in Helsinki, where he won a silver medal in the lightweight division.
Split into simpler sentences: Yevgeny Ivanovich Lopatin (26 December 1917--21 July 2011) was a Soviet weightlifter. He competed at the 1952 Summer Olympics in Helsinki and won a silver medal in the lightweight division.