Complex sentence: The station is known partly for being the starting point of John Peel's radio career, who later became a legendary British disc jockey, Peel notably covered the arraignment hearing of Lee Harvey Oswald shortly before Oswald was shot and killed.
Split into simpler sentences: The station is known partly for being the starting point of John Peel's radio career. A man who later became a legendary British disc jockey, Peel notably covered the arraignment hearing of Lee Harvey Oswald shortly before Oswald was shot and killed.