Complex sentence: Sabina is a Protected Designation of Origin (PDO) extra virgin olive oil of the Sabina territory, which covers approximately the ancient territory of the ancient peoples Sabines, in the Province of Rome and the Province of Rieti.
Split into simpler sentences: Sabina is a Protected Designation of Origin (PDO) that applies to the extra virgin olive oil produced in the Sabina region. This area approximately covers the territory originally occupied by the ancient Sabines tribe in the Province of Rome and the Province of Rieti.