Question: Kentucky is located in a region of america which constitutes as what?
Context: The Upper Thracian Plain (Bulgarian: Горнотракийска низина , "Gornotrakiyska nizina") constitutes the northern part of the historical region of Thrace.  It is located in southern Bulgaria, between the Sredna Gora mountains to the north and west; the Rhodopes, Sakar and Strandzha to the south; and the Black Sea to the east.  A fertile agricultural region, the Upper Thracian Plain proper has an area of 16032 km2 and an average elevation of 168 m .  The plain is part of Northern Thrace (Северна Тракия, "Severna Trakiya").  The climate is transitional continental.  The highest temperature recorded in Bulgaria occurred here: it was 45.2 C at Sadovo in 1916.  The precipitation is 550 mm a year.  Important rivers are the Maritsa and its tributaries, the Tundzha, the Stryama, the Topolnitsa, and the Vacha.  Important cities include Plovdiv, Burgas, Stara Zagora, Pazardzhik, Asenovgrad, Haskovo, Yambol and Sliven. The Pindus (also Pindos or Pindhos) (Greek: Πίνδος ) mountain range is located in northern Greece and southern Albania.  It is roughly 160 km long, with a maximum elevation of 2,637 m (Mount Smolikas).  Because it runs along the border of Thessaly and Epirus, the Pindus range is often called the "spine of Greece".  The mountain range stretches from near the Greek-Albanian borders in Northern Epirus, entering the Epirus region and Macedonia region in northern Greece down to the north of the Peloponnese.  Geologically it constitutes an extension of the Dinaric Alps, which dominate the western region of the Balkan Peninsula.  This vast complex of mountains, peaks, plateaus, valleys and gorges traverses the Greek mainland from the Northwest to the Southeast.  Its length reaches almost 230 kilometers and its largest width is 70 kilometers. In anatomy, the hypogastrium (also called the hypogastric region or suprapubic region) is a region of the abdomen located below the umbilical region.  The pubis bone constitutes its lower limit.  The roots of the word "hypogastrium" mean "below the stomach"; the roots of "suprapubic" mean "above the pubic bone". Kentucky ( , ), officially the Commonwealth of Kentucky, is a state located in the east south-central region of the United States.  Although styled as the "State of Kentucky" in the law creating it, Kentucky is one of four U.S. states constituted as a commonwealth (the others being Virginia, Pennsylvania, and Massachusetts).  Originally a part of Virginia, in 1792 Kentucky became the 15th state to join the Union.  Kentucky is the 37th most extensive and the 26th most populous of the 50 United States. The East South Central States constitute one of the nine Census Bureau Divisions of the United States. The Strečno Castle (Slovak: "Strečniansky hrad" )(also called Strechun, Strechyn, Streczen, Streczan alebo Strežín) is a reconstructed ruin of a medieval castle of an irregular plan located in northern Slovakia, 12 km east of Žilina.  The castle stands on a 103 m calcite cliff above the international road E50 and village Strečno.  Along with the Old castle (Slovak: "Starhrad" ) constitutes a significant landscape landmark of the Upper Váh region.  Nowadays, after reconstruction, there are expositions of the Vah region regional museum (Slovak: "Považské múzeum v Žiline" ).  The first recorded mention of the stone castle is from 1316.  Today the castle belongs to the national cultural heritage of the Slovak republic. The Gran Desierto de Altar is one of the major sub-ecoregions of the Sonoran Desert, located in the State of Sonora, Northwest Mexico.  It includes the only active erg dune region in North America.  The desert extends across much of the northern border of the Gulf of California, reaching more than 100 km east to west, and over 50 km north to south.  It constitutes the largest continuous wilderness area within the Sonoran Desert. The Maine Highlands is a term used in the Maine tourism industry for a centrally located region that constitutes a large portion of the state of Maine.  The Highlands are made up of Piscataquis and Penobscot counties.  Formerly known as the Penquis region, the Maine Highlands name was adopted in the late 1990s to better describe the area as a tourism region. Elobey, Annobón, and Corisco was a colonial administration of Spanish Africa, consisting of the island of Annobón, located in the Gulf of Guinea, and the small islands of Elobey Grande, Elobey Chico and Corisco, located in the Bay of the Mitémélé River.  Its total area was under 36 km², and the estimated population in 1910 was 2,950 people.  The capital was Santa Isabel.  The islands are presently part of Equatorial Guinea.  Elobey Grande, Elobey Chico and Corisco are now part of the Litoral Province within the Continental Region of Equatorial Guinea, while Annobón constitutes a province in its own right within the Insular Region. Chalcidice or Chalkidike or Chalkidiki or Halkidiki (Greek: Χαλκιδική , "Chalkidikí", ] ), is a peninsula and regional unit of Greece, part of the Region of Central Macedonia in Northern Greece.  The autonomous Mount Athos region constitutes the easternmost part of the peninsula, but not of the regional unit.  The capital of Chalkidiki is the main town of Polygyros, located in the centre of the peninsula.
Answer: one of the nine Census Bureau Divisions