original: this volcano is well known for its ash explosions and pyroclastic flows .
simplifications: this volcano is well known for its ash explosions and pyroclastic flows . this volcano is known for its ash explosions and pyroclastic flows . this volcano is well known for its ash explosions and pyroclastic flow . this volcano is known for its ash and lava flows . this volcano is well known for its ash explosions and pyroclastic flows . this volcano is famous for throwing ash into the air and melted rock and gas flows . it has its ash explosions . this volcano is well known for pyroclastic flows . this volcano is well known for its ash explosions and pyroclastic flows .