Complex sentence: Widener later married Harvard professor Alexander Hamilton Rice, a surgeon and explorer whom she accompanied on a number of expeditions, including one on which she "went further up the Amazon than any white woman had penetrated" and was attacked by cannibals.
Split into simpler sentences: Widener later married Harvard professor Alexander Hamilton Rice, a surgeon and explorer. She subsequently accompanied him on a number of expeditions, including one on which she "went further up the Amazon than any white woman had penetrated" and was attacked by cannibals.