Complex sentence: He was diagnosed with pancreatic cancer in late 1966, and after undergoing surgery, made a final tour of England ending six weeks before his death on April 17,1967 in New York City.
Split into simpler sentences: He was diagnosed with pancreatic cancer in late 1966. After undergoing surgery, he made a final tour of England, which ended six weeks before his death, on April 17,1967, in New York City.