Add punctuation to the following sentence: But in the later 1950s the US Senate Labor Committee under the chairmanship of John McClellan which had been investigating corruption in American labor unions began to investigate Dave Beck and the Teamsters Union Robert Kennedy was the Committee counsel responsible for this investigation
But in the later 1950's the U.S. Senate Labor Committee under the chairmanship of John McClellan which had been investigating corruption in American labor unions began to investigate Dave Beck and the Teamsters Union. Robert Kennedy was the Committee counsel responsible for this investigation.