Complex sentence: Hermann Oelrichs also made a stunt of swimming with the sharks in 1891, and later in 1891, he offered a $500 prize to whoever could prove that a person could get attacked by a shark along the east coast of the United States.
Split into simpler sentences: Hermann Oelrichs also made a stunt of swimming with the sharks 1891. Later in 1891, he offered a $500 prize to whoever could prove that a person could get attacked by a shark along the east coast of the United States.