Complex sentence: Mabton is a city incorporated during the first few years of the 20th century, and located in Yakima County, Washington, at the eastern edge of the Yakama Indian reservation.
Split into simpler sentences: Mabton is a city in Yakima County, Washington, United States. Incorporated during the first few years of the 20th century, it is located at the eastern edge of the Yakama Indian reservation.