Complex sentence: Rome was to retain its name and each citizen was to be called a Roman, but as a community they were to be called Quirites; the Sabines were to be incorporated in the state and admitted into the tribes and curies.
Split into simpler sentences: Rome was to retain its name and each citizen was to be called a Roman, but as a community, they were to be called Quirites. The Sabines were to be incorporated in the state and admitted into the tribes and curies.