Complex sentence: Howard was working on his autobiography, tentatively titled "I Stooged to Conquer", when he died of lung cancer on May 4,1975, at Cedars-Sinai Medical Center in Los Angeles where he had been admitted a week earlier.
Split into simpler sentences: Howard was working on his autobiography, tentatively titled "I Stooged to Conquer" when he died of lung cancer on May 4,1975. He died at Cedars-Sinai Medical Center in Los Angeles, California where he was admitted a week earlier.