Complex sentence: A color commentator is a North American term for a sports commentator who assists the main commentator, often by filling in any time when play is not in progress, in other regions this role is varioulsly referred to as an analyst or summariser.
Split into simpler sentences: A color commentator is a North American term for a sports commentator who assists the main commentator, often by filling in any time when play is not in progress. In other regions this role is variously referred to as an analyst or summariser.