Complex sentence: Starlings may be sucked into aircraft jet engines, one of the worst cases being an incident in Boston in 1960 in which 62 people died after a turboprop airliner flew into a flock and plummeted into the sea at Winthrop Harbor.
Split into simpler sentences: Starlings may be sucked into aircraft jet engines, one of the worst instances of this being an incident in Boston in 1960. In this, 62 people died after a turboprop airliner flew into a flock and plummeted into the sea at Winthrop Harbor.