Complex sentence: The Bougainville secessionists came to terms with the central government in 1997, a constitution was drafted for a more autonomous regional polity within Papua New Guinea with its own "president," and provisions for a referendum on total autonomy in due course.
Split into simpler sentences: The Bougainville secessionists came to terms with the central government in 1997. A constitution was drafted for a more autonomous regional polity within Papua New Guinea with its own "president," and provisions for a referendum on total autonomy in due course.