Question: when was kudzu introduced to the united states
[{'answer': '1876', 'provenance': [{'wikipedia_id': '28125449', 'title': 'Kudzu in the United States', 'start_paragraph_id': 12, 'start_character': 66, 'end_paragraph_id': 12, 'end_character': 70, 'bleu_score': 1.0, 'section': 'Section::::History and underlying biology.:History of US introduction.\n'}]}, {'answer': 'in 1876', 'provenance': [{'wikipedia_id': '28125449', 'title': 'Kudzu in the United States', 'start_paragraph_id': 12, 'start_character': 63, 'end_paragraph_id': 12, 'end_character': 70, 'bleu_score': 1.0, 'section': 'Section::::History and underlying biology.:History of US introduction.\n'}]}, {'provenance': [{'wikipedia_id': '28125449', 'title': 'Kudzu in the United States', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 1570, 'bleu_score': 0.9520457805223721, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12366758128827493519}, 'section': 'Section::::History and underlying biology.:History of US introduction.\n'}]}, {'provenance': [{'wikipedia_id': '57866', 'title': 'Kudzu', 'section': 'Section::::Invasive species.:United States.\n', 'start_paragraph_id': 31, 'end_paragraph_id': 31, 'meta': {'evidence_span': ['Kudzu was introduced from Japan into the United States at the Japanese pavilion in the 1876 Centennial Exposition in Philadelphia. In the 1930s and 1940s, the vine was rebranded as a way for farmers to stop soil erosion. Workers were paid $8 per acre to sow topsoil with the invasive vine. The cultivation covered over one million acres of kudzu. It is now common along roadsides and other disturbed areas throughout most of the southeastern United States as far north as rural areas of Pulaski County, Illinois. Estimates of its rate of spreading differ wildly; it has been described as spreading at the rate of annually, although in 2015 the United States Forest Service estimated the rate to be only 2,500 acres per year.', 'Kudzu was introduced from Japan into the United States at the Japanese pavilion in the 1876 Centennial Exposition in Philadelphia.', 'Kudzu was introduced from Japan into the United States at the Japanese pavilion in the 1876 Centennial Exposition in Philadelphia. In the 1930s and 1940s, the']}}]}, {'provenance': [{'wikipedia_id': '28125449', 'title': 'Kudzu in the United States', 'section': 'Section::::History and underlying biology.:History of US introduction.\n', 'start_paragraph_id': 12, 'end_paragraph_id': 12, 'meta': {'evidence_span': ['The kudzu plant was introduced to the United States from Japan in 1876 at the Centennial Exposition in Philadelphia. Kudzu was introduced to the Southeast in 1883 at the New Orleans Exposition. The vine was widely marketed in the Southeast as an ornamental plant to be used to shade porches, and in the first half of the 20th century, kudzu was distributed as a high-protein content cattle fodder and as a cover plant to prevent soil erosion. It was cultivated by Civilian Conservation Corps workers as a solution for the erosion during the Dust Bowl. The Soil Erosion Service recommended the use of kudzu to help control erosion of slopes which led to the government-aided distribution of 85 million seedlings and government-funded plantings of kudzu which paid $19.75 per hectare. By 1946, it was estimated that of kudzu had been planted. When boll weevil infestations and the failure of cotton crops caused farmers to abandon their farms, kudzu plantings were left unattended. The climate and environment of the Southeastern United States allowed the kudzu to grow virtually unchecked. In 1953 the United States Department of Agriculture removed kudzu from a list of suggested cover plants and listed it as a weed in 1970. By 1997, the vine was placed on the "Federal Noxious Weed List". Today, kudzu is estimated to cover of land in the southeastern United States, mostly in Alabama, Georgia, Tennessee, Florida, North Carolina, South Carolina and Mississippi. It has been recorded in Nova Scotia, Canada, in Columbus, Ohio, and in all five boroughs of New York City.', 'The kudzu plant was introduced to the United States from Japan in 1876 at the Centennial Exposition in Philadelphia.', 'The kudzu plant was introduced to the United States from Japan in 1876 at the Centennial Exposition in Philadelphia. Kudzu was introduced to the Southeast in 1883 at the New Orleans Exposition. The vi']}}]}, {'provenance': [{'wikipedia_id': '28125449', 'title': 'Kudzu in the United States', 'section': 'Section::::Ecology in and effect on new communities.:New communities.\n', 'start_paragraph_id': 19, 'end_paragraph_id': 19, 'meta': {'evidence_span': ["can be found in Puerto Rico and South America. Other uses may include: paper products, food products, insect repellents (the smoke from burning leaves), honey, and methane production. Kudzu also has potential as a source for biofuel. Kudzu was intentionally introduced to North America by the Soil Erosion Service and Civilian Conservation Corp in 1876 for the purpose of controlling soil erosion in Pennsylvania. When kudzu was first introduced in the southeast, it was initially used as an ornamental vine to shade homes. By the early 20th century, southerners began to use kudzu for purposes other than ornamentation and so kudzu began to come closer in contact with the land which, in turn, encouraged its spread throughout the southeast. In the 135 years since its introduction, kudzu has spread over three million hectares (ha) of the southern United States, and continues to 'consume' the south at an estimated rate of per year, destroying power lines, buildings, and native vegetation in its path. This claim, however, was disputed in 2015 with the United States Forest Service estimating an increase of 2,500\xa0acres (1,000\xa0ha) per year. In the United States, kudzu is extensively reported in Alabama, Arkansas, Washington, D.C., Delaware, Florida, Georgia, Illinois, Indiana, Kentucky, Louisiana, Maryland, Missouri, Mississippi, North Carolina, North Dakota, New Jersey, Oregon, Ohio, Pennsylvania, South Carolina, Tennessee, Texas, Virginia, and West Virginia. Of these states, three in the southeast have the heaviest infestations: Georgia, Alabama, and Mississippi.", 'Kudzu was intentionally introduced to North America by the Soil Erosion Service and Civilian Conservation Corp in 1876 for the purpose of controlling soil erosion in Pennsylvania.']}}]}]