Question: When did the state where Texhomex is located join the U.S.?

full_context: Document 1: Texhomex: Texhomex is a marker showing the tri-point of Oklahoma, Texas and New Mexico. The marker is off U.S. Highway 56 about one mile east on Texas State Line Road and the corner of Oklahoma State Line Road. There are no signs on Highway 56 in either direction.
Document 2: New Mexico: Inhabited by Native Americans for thousands of years before European exploration, it was colonized by the Spanish in 1598 as part of the Imperial Spanish viceroyalty of New Spain. It was named Nuevo México after the Aztec Valley of Mexico by Spanish settlers, 223 years before the establishment of the present - day country of Mexico. The present - day state of New Mexico was not named after, nor is it a part of, Mexico. Its geographic characteristics made settlement and effective political control difficult which prompted Mexico's invasion and control of the area from 1824 to 1846. New Mexico's Spanish origins made cultural integration with Mexico unsuitable, which sparked the Revolt of 1837 and a growing economic association with the expanding United States. The 1848 Mexican -- American War indirectly capitalized on this tension and created the U.S. New Mexico Territory. It was admitted to the Union as the 47th state on January 6, 1912.
Document 3: Triangle Expressway: The Triangle Expressway (TriEx) is the first modern toll road built in North Carolina, and one of the first toll roads in the United States built to use only electronic toll collection instead of toll booths. The overall freeway consists of two segments called the Triangle Parkway and the Western Wake Freeway. The six-lane Triangle Parkway extends the pre-existing NC 147 in Durham County to meet NC 540 in Morrisville in Wake County. The Western Wake Freeway extends the total Triangle Expressway to long, extending NC 540 where it continues along to Holly Springs.
Document 4: Florida Territory: The Territory of Florida was an organized incorporated territory of the United States that existed from March 30, 1822, until March 3, 1845, when it was admitted to the Union as the State of Florida. Originally the Spanish territory of La Florida, and later the provinces of East and West Florida, it was ceded to the United States as part of the 1819 Adams -- Onís Treaty. It was governed by the Florida Territorial Council.
Document 5: Dakota Territory: The Territory of Dakota was an organized incorporated territory of the United States that existed from March 2, 1861, until November 2, 1889, when the final extent of the reduced territory was split and admitted to the Union as the states of North and South Dakota.
Document 6: Alabama Territory: The Territory of Alabama (sometimes Alabama Territory) was an organized incorporated territory of the United States. The Alabama Territory was carved from the Mississippi Territory on August 15, 1817 and lasted until December 14, 1819, when it was admitted to the Union as the twenty-second state.
Document 7: Texas: Texas (/ ˈtɛksəs /, locally / ˈtɛksəz /; Spanish: Texas or Tejas, pronounced (ˈtexas)) is the second largest state in the United States by both area and population. Geographically located in the South Central region of the country, Texas shares borders with the U.S. states of Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the west, and the Mexican states of Chihuahua, Coahuila, Nuevo León, and Tamaulipas to the southwest, while the Gulf of Mexico is to the southeast.
Document 8: Oklahoma City: Oklahoma City is an integral point on the United States Interstate Network, with three major interstate highways – Interstate 35, Interstate 40, and Interstate 44 – bisecting the city. Interstate 240 connects Interstate 40 and Interstate 44 in south Oklahoma City, while Interstate 235 spurs from Interstate 44 in north-central Oklahoma City into downtown.
Document 9: Oklahoma: The western edge of the Oklahoma panhandle is out of alignment with its Texas border. The Oklahoma/New Mexico border is actually 2.1 to 2.2 miles east of the Texas line. The border between Texas and New Mexico was set first as a result of a survey by Spain in 1819. It was then set along the 103rd Meridian. In the 1890s, when Oklahoma was formally surveyed using more accurate surveying equipment and techniques, it was discovered that the Texas line was not set along the 103rd Meridian. Surveying techniques were not as accurate in 1819, and the actual 103rd Meridian was approximately 2.2 miles to the east. It was much easier to leave the mistake as it was than for Texas to cede land to New Mexico to correct the original surveying error. The placement of the Oklahoma/New Mexico border represents the true 103rd Meridian.
Document 10: New Mexico Territory: The Territory of New Mexico was an organized incorporated territory of the United States that existed (with varying boundaries) from September 9, 1850, until January 6, 1912, when the remaining extent of the territory was admitted to the Union as the State of New Mexico, making it the longest - lived organized incorporated territory of the United States, lasting approximately 62 years.
Document 11: Utah Territory: The Territory of Utah was an organized incorporated territory of the United States that existed from September 9, 1850, until January 4, 1896, when the final extent of the territory was admitted to the Union as the State of Utah, the 45th state.
Document 12: New Mexico: Inhabited by Native Americans for thousands of years before European exploration, it was colonized by the Spanish in 1598 as part of the Imperial Spanish viceroyalty of New Spain. In 1563, it was named Nuevo México after the Aztec Valley of Mexico by Spanish settlers, 223 years before the establishment and naming of the present - day country of Mexico; thus, the present - day state of New Mexico was not named after the country today known as Mexico. Its geographic characteristics made settlement and effective political control difficult which prompted Mexico's invasion and control of the area from 1824 to 1846. New Mexico's Spanish origins made cultural integration with Mexico unsuitable, which sparked the Revolt of 1837 and a growing economic association with the expanding United States. The 1848 Mexican -- American War indirectly capitalized on this tension and created the U.S. New Mexico Territory. It was admitted to the Union as the 47th state on January 6, 1912.
Document 13: Three-Country Cairn: Three - Country Cairn (Finnish: Kolmen valtakunnan rajapyykki, Northern Sami: Golmma riikka urna, Norwegian: Treriksrøysa, Swedish: Treriksröset) is the point at which the international borders of Sweden, Norway and Finland meet, and the name of the monument that marks the point. It is an example of a geographical feature known as a tripoint.
Document 14: Oklahoma: More than 12,000 miles (19,000 km) of roads make up the state's major highway skeleton, including state-operated highways, ten turnpikes or major toll roads, and the longest drivable stretch of Route 66 in the nation. In 2008, Interstate 44 in Oklahoma City was Oklahoma's busiest highway, with a daily traffic volume of 123,300 cars. In 2010, the state had the nation's third highest number of bridges classified as structurally deficient, with nearly 5,212 bridges in disrepair, including 235 National Highway System Bridges.
Document 15: Southwest Territory: The Territory South of the River Ohio, more commonly known as the Southwest Territory, was an organized incorporated territory of the United States that existed from May 26, 1790, until June 1, 1796, when it was admitted to the United States as the State of Tennessee. The Southwest Territory was created by the Southwest Ordinance from lands of the Washington District that had been ceded to the U.S. federal government by North Carolina. The territory's lone governor was William Blount.
ground_truth: January 6, 1912
sub_queries: Texhomex >> located in the administrative territorial entity Answer: New Mexico
when did New Mexico become part of the us Answer: January 6, 1912