Sentence: 'Cynops ensicauda popei can be found on the islands of Okinawa , Sesoko , Hamahiga , Tonaki , Tokashiki , Zamami , Geruma , and Aka , which are all administratively part of Okinawa Prefecture .', Argument/Subject 1: 'okinawa', Argument/Subject 2: 'okinawa prefecture'
be island in