Complex sentence: The Maricopa Association of Governments (abbreviated MAG) is an association of governments that represents the bulk of the Phoenix metro area in Arizona, formed as a result of the guidelines of the 1973 Federal Transportation Act.
Split into simpler sentences: The Maricopa Association of Governments (abbreviated MAG) is an association of governments that represents the bulk of the metropolitan area of Phoenix, Arizona. It was formed as a result of the guidelines of the 1973 Federal Transportation Act.