Complex sentence: The city of Keller is a voluntary member of the North Central Texas Council of Governments association, the purpose of which is to coordinate individual and collective local governments and facilitate regional solutions, eliminate unnecessary duplication, and enable joint decisions.
Split into simpler sentences: The city of Keller is a voluntary member of the North Central Texas Council of Governments association. The member's purpose is to coordinate individual and collective local governments, assist regional solutions, eliminate unnecessary duplication, and enable joint decisions.