premise: The Cyclades are an island group.
hypothesis: The Cyclades ( [ ˈsɪklədiːz ] Κυκλάδες , [ cikˈlaðes ] ) are an island group in the Aegean Sea , southeast of mainland Greece and a former administrative prefecture of Greece . They are one of the island groups which constitute the Aegean archipelago . The name refers to the islands around the sacred island of Delos . The largest island of the Cyclades is Naxos .