claim: Mikhail Prokhorov used to be the President of Onexim Group.
evidence: Wentworth was a parliamentary constituency in South Yorkshire .. South Yorkshire. South Yorkshire. parliamentary constituency. Borough constituency. Originally created in 1918 and was abolished in 1950 , the name was revived when a new constituency was created from 1983 to 2010 .. Throughout its history , Wentworth was a safe seat for the Labour Party .. safe seat. safe seat. Labour Party. Labour Party ( UK )