paragraph_text: The La Plata Mountains are a small subrange of the San Juan Mountains in the southwestern part of Colorado, United States. They are located on the border between Montezuma and La Plata counties, about northwest of Durango. Their name is Spanish for "silver".

paragraph_text: Joe Creason Park is a municipal park in Louisville, Kentucky, United States. Located in the Poplar Level neighborhood, it is in roughly the central portion of the city. The park adjoins and connects to Beargrass Creek State Nature Preserve, and both were originally part of the same property prior to becoming parks.

paragraph_text: Penasse is an unincorporated community in Angle Township, Lake of the Woods County, Minnesota, United States. Penasse is located on Penasse Island in Lake of the Woods, in the northern part of Northwest Angle. Its location makes it the northernmost populated place in the contiguous United States. The community was named for Tom Penasse, an American Indian from the area; it had a post office from 1920 to 1969. The French built Fort Saint Charles nearby in 1732.

paragraph_text: Montgomery is a town in Franklin County, Vermont, United States. The population as of the 2010 census was 1,201, up from 992 in 2000. In 1963, part of Avery's Gore in Franklin County became part of Montgomery, with the other section becoming part of Belvidere in Lamoille County.

paragraph_text: The Midwestern United States, also referred to as the American Midwest, Middle West, or simply the Midwest, is one of four geographic regions defined by the United States Census Bureau. It occupies the northern central part of the United States of America. It was officially named the North Central region by the Census Bureau until 1984. It is located between the Northeastern U.S. and the Western U.S., with Canada to its north and the Southern U.S. to its south.

paragraph_text: Ohio is a town in Herkimer County, New York, United States. The population was 1,002 at the 2010 census. The town is named after the state of Ohio. The town is in the northern part of the county and northeast of Utica. Part of Ohio is within the Adirondack Park.

paragraph_text: Jedediah Smith Redwoods State Park is a state park of California, United States, preserving old-growth redwoods along the Smith River. It is located along U.S. Route 199 approximately east of Crescent City. The park is named after explorer Jedediah Smith, and is one of four parks cooperatively managed as Redwood National and State Parks. The park was established in 1939 and designated part of the California Coast Ranges International Biosphere Reserve in 1983.

paragraph_text: Plainfield Township is a township in Northampton County, Pennsylvania, United States. Plainfield Township is located in the Lehigh Valley region of the state. It is part of Pennsylvania's Slate Belt .

paragraph_text: The Philippines has had small grassroots movements for U.S. statehood. Originally part of the platform of the Progressive Party, then known as the Federalista Party, the party dropped it in 1907, which coincided with the name change. As recently as 2004, the concept of the Philippines becoming a U.S. state has been part of a political platform in the Philippines. Supporters of this movement include Filipinos who believe that the quality of life in the Philippines would be higher and that there would be less poverty there if the Philippines were an American state or territory. Supporters also include Filipinos that had fought as members of the United States Armed Forces in various wars during the Commonwealth period.

paragraph_text: The United States Virgin Islands (USVI; also called the American Virgin Islands), officially the Virgin Islands of the United States, is a group of islands in the Caribbean and an unincorporated and organized territory of the United States. The islands are geographically part of the Virgin Islands archipelago and are located in the Leeward Islands of the Lesser Antilles.

paragraph_text: The United States Oath of Allegiance, officially referred to as the ``Oath of Allegiance, ''8 C.F.R. Part 337 (2008), is an allegiance oath that must be taken by all immigrants who wish to become United States citizens.

paragraph_text: Bethel is a town in Pitt County, North Carolina, United States. The population was 1,577 at the 2010 Census. The town is a part of the Greenville Metropolitan Area located in North Carolina's Inner Banks region. Confusingly, there are three other towns in the state named "Bethel." One is between Edenton and Hertford in the "Finger Counties" region in the Northeast corner of the state, another is in the North-Central part in Caswell County and the third is located in the Mountain Region of North Carolina in Haywood County.

paragraph_text: The Kingdom of Hawai ʻi was sovereign from 1810 until 1893 when the monarchy was overthrown by resident American and European capitalists and landholders. Hawaii was an independent republic from 1894 until August 12, 1898, when it officially became a territory of the United States. Hawaii was admitted as a U.S. state on August 21, 1959.

paragraph_text: Arabela is an unincorporated community located in Lincoln County, New Mexico, United States. Arabela is located in a rural part of eastern Lincoln County, east of Capitan.

paragraph_text: The Treaty Clause is part of Article II, Section 2, Clause 2, of the United States Constitution, that empowers the President of the United States to propose and chiefly negotiate agreements between the United States and other countries, which, upon receiving the advice and consent of a two - thirds supermajority vote of the United States Senate, become binding with the force of federal law.

paragraph_text: The Treaty Clause is part of Article II, Section 2, Clause 2, of the United States Constitution, that empowers the President of the United States to propose and chiefly negotiate agreements between the United States and other countries, which, upon receiving the advice and consent of a two - thirds supermajority vote of the United States Senate, become treaties under international law.

paragraph_text: The Fielding Garr Ranch is a ranch located on the southeastern portion of Antelope Island State Park in the Great Salt Lake, Utah, United States and is part of the Utah State Parks system.

paragraph_text: Butlerville is a village in central Harlan Township, Warren County, Ohio, United States, located in the southwestern part of the state. The population was 163 at the 2010 census.

paragraph_text: O'Donnell Heights is a neighborhood named for a public housing development in the far southeastern part of the city of Baltimore, Maryland, United States. It is located south and east of Interstate 95, just west of the border with Baltimore County, and north of the St. Helena neighborhood.

paragraph_text: Hālona Blowhole is a rock formation and a blowhole on the island of Oahu, Hawaii off of Hanauma Bay at Hālona Point overlooking the Pacific Ocean. In Hawaiian "hālona" means "lookout".

Question: When did the state where Hālona Blowhole is located become part of the United States?
Answer: August 12, 1898