Complex sentence: Public schools are in the Las Cruces Public School District, which covers the city of Las Cruces as well as White Sands Missile Range, the settlement of Doña Ana, and the town of Mesilla.
Split into simpler sentences: Public schools are in the Las Cruces Public School District. The District covers the city of Las Cruces as well as White Sands Missile Range, the settlement of Doña Ana, and the town of Mesilla.