premise: An island is part of the ABC Islands.
hypothesis: The ABC Islands is the colloquial name for the Alaskan islands of Admiralty , Baranof , and Chichagof in the northern part of the Alexander Archipelago , which are all part of the Tongass National Forest . The city of Sitka has its urban center on the west coast of Baranof Island . Outside of Sitka , there is only minimal industry and human presence on the islands , despite the fact that Admiralty ( 7th ) , Baranof ( 10th ) and Chichagof ( 5th ) are among the largest islands in the United States . ABC islands . ABC Islands ( Alaska ) , comprising Admiralty Island , Baranof Island , and Chichagof Island The ABC islands are the three western-most islands of the Leeward Antilles in the Caribbean Sea that lie north of Falcón State , Venezuela .