Sentence 1: Turner represented the Ontario riding of London East at which he was elected in 1968 and re-elected in 1972 , 1974 , 1979 and 1980 .
Sentence 2: Turner represented the Ontario - horse riding of London East , on which he was elected in 1968 and was re-elected in 1972 , 1974 , 1979 and 1980 .

Do these two sentences convey the same information?
yes