Complex sentence: The Campaign for Nuclear Disarmament (CND) is an organization that advocates unilateral nuclear disarmament by the United Kingdom, and for international nuclear disarmament and tighter international arms regulation through agreements such as the Nuclear Non-Proliferation Treaty.
Split into simpler sentences: The Campaign for Nuclear Disarmament (CND) is an organization that advocates unilateral nuclear disarmament by Britain. It also campaigns for international nuclear disarmament and tighter international arms regulation through agreements such as the Nuclear Non-Proliferation Treaty.