Question: When did the city Charlotte Cortlandt Ellis is from become part of the U.S.?

full_context: Document 1: 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 2: Ellen Churchill Semple: Ellen Churchill Semple (January 8, 1863 -- May 8, 1932) was an American geographer and the first female president of the Association of American Geographers. She contributed significantly to the early development of the discipline of geography in the United States, particularly studies of human geography. She is most closely associated with work in anthropogeography and environmentalism, and the debate about ``environmental determinism ''.
Document 3: Ellen Schulz Quillin: Ellen Dorothy Schulz Quillin (June 16, 1892 – May 6, 1970) was an American botanist, author, and museum director who helped establish the Witte Museum in San Antonio, Texas. She was the museum's director from 1926 to 1960. Quillin also wrote several field guides relating to plants in Texas.
Document 4: 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 5: Charlotte Cortlandt Ellis: Charlotte Cortlandt Ellis (27 June 1874 – 17 March 1956) was an American botanist and plant collector active in New Mexico. She discovered several plant species and collected numerous plant specimens.
Document 6: Clara Eaton Cummings: Clara Eaton Cummings (13 July 1855 – 28 December 1906) was an American cryptogamic botanist and Hunnewell Professor of Cryptogamic Botany at Wellesley College in Massachusetts.
Document 7: 543 Charlotte: Charlotte (minor planet designation: 543 Charlotte) is a minor planet orbiting the Sun. It was discovered by Paul Götz on September 11, 1904 in Heidelberg.
Document 8: 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 9: 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.
Document 10: Eileen Barnes: Eileen Barnes (1876–1956) was a notable and highly acclaimed botanical artist, well known for her definitive and accurate depictions of Ireland's plant life.
Document 11: 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 12: 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 13: Rose E. Collom: Rose Eudora Collom ("née" Wilson, 1870 – 1956) was an American botanist and plant collector. She was the first paid botanist of the Grand Canyon National Park.
Document 14: Elizabeth Coleman White: Elizabeth Coleman White (October 5, 1871November 11, 1954) was a New Jersey agricultural specialist who collaborated with Frederick Vernon Coville to develop and commercialize a cultivated blueberry.
Document 15: 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.
ground_truth: January 6, 1912
sub_queries: What city is Charlotte Cortlandt Ellis from? Answer: New Mexico
when did New Mexico become part of the us Answer: January 6, 1912