Complex sentence: The first planned community in Newbury Park is census-designated place Casa Conejo, located in a roughly square-shaped unincorporated area, is the only remaining part of Newbury Park not governed by the City of Thousand Oaks.
Split into simpler sentences: The first planned community in Newbury Park is census-designated place Casa Conejo, located in a roughly square-shaped unincorporated area. It is the only remaining part of Newbury Park not governed by the City of Thousand Oaks.