Premise: Santorini . It forms the southernmost member of the Cyclades group of islands , with an area of approximately 73 km2 and a 2011 census population of 15,550 . The municipality of Santorini includes the inhabited islands of Santorini and Therasia and the uninhabited islands of Nea Kameni , Palaia Kameni , Aspronisi , and Christiana . The main island slopes downward to the Aegean Sea .
Hypothesis: Santorini is an island.
Label: ENTAILMENT