Complex sentence: Clayton incorporated in 1964 in order to stave off annexation attempts by nearby Concord, and initially included the downtown, Cardinet Glen, Four Oaks, Mitchell Canyon Estates, Glen Almond, Fremont Village and Pine Hollow neighborhoods.
Split into simpler sentences: Clayton incorporated in 1964 in order to stave off an annexation attempt of the Cardinet Glen neighborhood by nearby Concord. The city initially included the downtown, Cardinet Glen, Four Oaks, Mitchell Canyon Estates, Glen Almond, Fremont Village and Pine Hollow neighborhoods.