Complex sentence: The institution is usually referred to as "Policía Bonaerense", where "bonaerense" is the demonym for the Province of Buenos Aires, in contrast with "porteño", used for the inhabitants of the Buenos Aires city.
Split into simpler sentences: The institution is usually referred to as "Policía Bonaerense", where "bonaerense" is the demonym for the Province of Buenos Aires. This contrasts with "porteño", used for the inhabitants of the Buenos Aires city.