Complex sentence: In a botched electrocution at Sing Sing in 1903, Fred Van Wormer was electrocuted and pronounced dead, but, upon arrival in the autopsy room, he was seen to be breathing once again.
Split into simpler sentences: In a botched electrocution at Sing Sing in 1903, Fred Van Wormer was electrocuted and pronounced dead. But, upon arrival in the autopsy room he was seen to be breathing once again.