Complex sentence: On 21 November 2006 several large pieces were seen just 60 km off the coast of Timaru, New Zealand--the largest measured about 1.8 km (~ 1 mi), rising 37 m (120 ft) from the surface of the ocean.
Split into simpler sentences: On 21 November 2006 several large pieces were seen just 60 km off the coast of Timaru, New Zealand. The largest measured about 1.8 km (~ 1 mi), rising 37 m (120 ft) from the surface of the ocean.