Complex sentence: Chatham Island is by far the largest island of the Chatham Islands group, in the south Pacific Ocean off the eastern coast of New Zealand, advertised as "halfway between the equator and the pole, and right on the International Date Line".
Split into simpler sentences: Chatham Island is by far the largest island of the Chatham Islands group, in the south Pacific Ocean off the eastern coast of New Zealand. It is said to be "halfway between the equator and the pole, and right on the International Date Line".