Complex sentence: Carriage Hills, a residential subdivision and the neighborhood is an incorporated integral part of Richmond, California in the far eastern edge of the city, it is however geographically considered part of El Sobrante, although substantial portions of this unincorporated area are in Richmond as well.
Split into simpler sentences: Carriage Hills, a residential subdivision and the neighborhood is an incorporated integral part of Richmond, California. It is located in the far eastern edge of the city, it is however geographically considered part of El Sobrante, although substantial portions of this unincorporated area are in Richmond as well.