Complex sentence: Constructed on historical lava deposits near the then inactive Soufriere Hills volcano, the town was evacuated when the volcano resumed erupting in 1995, and was abandoned permanently in 1997 after it was burnt and mostly buried by a series of pyroclastic flows and lahars.
Split into simpler sentences: Constructed on historical lava deposits near the then-inactive Soufriere Hills volcano, the town was evacuated when the volcano resumed erupting in 1995. Plymouth was abandoned permanently in 1997 after it was burnt and mostly buried by a series of pyroclastic flows and lahars.