 Complete the following phrase:  Yury Petrovich Vlasov ; 5 December 1935  13 February 2021 was a Soviet and Russian heavyweight weightlifter, writer and politician. He competed at the 1960 and 1964 Olympics and won a gold medal in 1960 and a silver in 1964; at both games, he was the Olympic flag bearer for the Soviet Union. During his career, Vlasov won four world titles and set 31 ratified world records. He retired in 1968 and became a prominent writer and later a politician. He was a member of the Congress of Peoples Deputies of the Soviet Union 1989 and then of the Russian State Duma 1993 and took part in the 