Complex sentence: Operation Sandwedge was a proposed clandestine intelligence-gathering operation against the political enemies of the Richard Nixon presidential administration, put together by H. R. Haldeman, John Ehrlichman and Jack Caulfield in 1971.
Split into simpler sentences: Operation Sandwedge was a proposed clandestine intelligence-gathering operation against the political enemies of the Richard Nixon presidential administration. The proposals were put together by H. R. Haldeman, John Ehrlichman and Jack Caulfield in 1971.