Question: When did the drinking age increased to 21 in the state where Driftless takes place?

full_context: Document 1: Alcohol laws of Wisconsin: The 1983 Wisconsin Act 74, effective July 1, 1984, created a drinking age of 19. Meeting in special session at the call of the governor, the legislature enacted 1985 Wisconsin Act 337, which raised the drinking age to 21 and brought the state into compliance with the NMDA (National Minimum Drinking Age) on September 1, 1986.
Document 2: Alcohol laws of Wisconsin: The drinking age in Wisconsin is 21. Those under the legal drinking age may be served, possess, or consume alcohol if they are with a parent, legal guardian, or spouse who is of legal drinking age. Those age 18 to 20 may also possess (but not consume) alcohol as part of their employment.
Document 3: Alcohol laws of New York: In response to the National Minimum Drinking Age Act in 1984, which reduced by up to 10% the federal highway funding of any state which did not have a minimum purchasing age of 21, the New York Legislature raised the drinking age from 19 to 21, effective December 1, 1985. (The drinking age had been 18 for many years before the first raise in 1984, to 19.) Persons under 21 are prohibited from purchasing alcohol or possessing alcohol with the intent to consume, unless the alcohol was given to that person by their parent or legal guardian. There is no law prohibiting where people under 21 may possess or consume alcohol that was given to them by their parents. Persons under 21 are prohibited from having a blood alcohol level of 0.02% or higher while driving.
Document 4: Bill Johnson (author): Bill Johnson (born in the late 1950s in South Dakota) is a science fiction writer whose works often have a "regional" tone influenced by his South Dakota origins. This is particularly true of his story "We Will Drink a Fish Together," which in 1998 won the Hugo Award for Best Novelette. His 1999 collection is called "Dakota Dreamin". His novel "Heroes & Friends" came out in 2015.
Document 5: National Minimum Drinking Age Act: The National Minimum Drinking Age Act of 1984 (23 U.S.C. § 158) was passed by the United States Congress on July 17, 1984. It was a controversial bill that punished every state that allowed persons below 21 years to purchase and publicly possess alcoholic beverages by reducing its annual federal highway apportionment by 10 percent. The law was later amended, lowering the penalty to 8 percent from fiscal year 2012 and beyond.
Document 6: A Scattered Life: Set in small-town Wisconsin and told with humor and pathos, "A Scattered Life" is the story of a friendship triangle between a young wife, her intrusive mother-in-law, and a baby-obsessed mother of five.
Document 7: O Pioneers!: "O Pioneers!" tells the story of the Bergsons, a family of Swedish-American immigrants in the farm country near the fictional town of Hanover, Nebraska, at the turn of the 20th century. The main character, Alexandra Bergson, inherits the family farmland when her father dies, and she devotes her life to making the farm a viable enterprise at a time when many other immigrant families are giving up and leaving the prairie. The novel is also concerned with two romantic relationships, one between Alexandra and family friend Carl Linstrum and the other between Alexandra's brother Emil and the married Marie Shabata.
Document 8: 800 Words: George Turner is a popular columnist for a top selling Sydney newspaper, writing a weekly column which he insists must be exactly 800 words. After his wife dies, he buys - over the internet and unseen - a house in a (fictional) small New Zealand seaside town called Weld, where his parents took him on holiday as a child. He then has to break the news to his two teenage children, Shay and Arlo. But the colourful and inquisitive locals in Weld ensure Turner's dream of a fresh start does not go exactly to plan.
Document 9: U.S. history of alcohol minimum purchase age by state: From 1976 to 1983, several states voluntarily raised their purchase ages to 19 (or, less commonly, 20 or 21), in part to combat drunk driving fatalities. In 1984, Congress passed the National Minimum Drinking Age Act, which required states to raise their ages for purchase and public possession to 21 by October 1986 or lose 10% of their federal highway funds. By mid-1988, all 50 states and the District of Columbia had raised their purchase ages to 21 (but not Puerto Rico, Guam, or the Virgin Islands, see Additional Notes below). South Dakota and Wyoming were the final two states to comply with the age 21 mandate. The current drinking age of 21 remains a point of contention among many Americans, because of it being higher than the age of majority (18 in most states) and higher than the drinking ages of most other countries. The National Minimum Drinking Age Act is also seen as a congressional sidestep of the tenth amendment. Although debates have not been highly publicized, a few states have proposed legislation to lower their drinking age, while Guam has raised its drinking age to 21 in July 2010.
Document 10: Driftless: Driftless a winner of the Milkweed Editions National Fiction Prize, is a novel by David Rhodes that was published in 2008. It is set in the Driftless area of southwestern Wisconsin. The novel is about the inhabitants of the unincorporated town of Words, and it is told through their eyes and via the ways they interact with and impact one another.
Document 11: Kit's Wilderness: Kit's Wilderness is a children's novel by David Almond, published by Hodder Children's Books in 1999. It is set in a fictional English town in the northeast of the country and was based on the former coal-mining towns the author knew as a child growing up in Tyne and Wear. It was silver runner-up for the Smarties Prize in ages category 9–11 years, highly commended for the Carnegie Medal, and shortlisted for the Guardian Prize.
Document 12: The Drifters (novel): The Drifters is a novel by Pulitzer Prize-winning author James A. Michener, published in 1971 by Random House. The novel follows six young characters from diverse backgrounds and various countries as their paths meet and they travel together through parts of Spain, Portugal, Morocco and Mozambique. The story is told from the perspective of the narrator, George Fairbanks, who is an investment analyst for the fictional company World Mutual Bank in Switzerland. Mr. Fairbanks is connected with nearly every character in some way, and they all seem to open up to him throughout the novel in one way or another.
Document 13: Alcohol laws of Wisconsin: The drinking age in Wisconsin is 21. Those under the legal drinking age may be served, possess, or consume alcohol if they are with a parent, legal guardian, or spouse who is of legal drinking age. Those age 18 - 20 may also be served, possess or consume alcohol if they are with a parent, legal guardian, or spouse who is of legal drinking age. Those age 18 to 20 may also possess (but not consume) alcohol as part of their employment.
Document 14: In the Lake of the Woods: In the Lake of the Woods (1994) is a novel by the American author Tim O'Brien. Related to issues of the Vietnam War theme, "In the Lake of the Woods" follows the struggle of John Wade to deal with a recently failed campaign for the United States Senate. After moving to Lake of the Woods, Minnesota, John discovers one morning that his wife Kathy is missing. Through the use of flashbacks of John's childhood, college years, and Vietnam experiences, as well as testimony and evidence from affected characters, the novel provides several hypotheses for the disappearance of Kathy Wade, leaving the decision up to the reader.
Document 15: Alcohol laws of New York: In response to the National Minimum Drinking Age Act in 1984, which reduced by up to 10% the federal highway funding of any state which did not have a minimum purchasing age of 21, the New York Legislature raised the drinking age from 19 to 21, effective December 1, 1985. (The drinking age had been 18 for many years before the first raise on December 4th, 1982, to 19.) Persons under 21 are prohibited from purchasing alcohol or possessing alcohol with the intent to consume, unless the alcohol was given to that person by their parent or legal guardian. There is no law prohibiting where people under 21 may possess or consume alcohol that was given to them by their parents. Persons under 21 are prohibited from having a blood alcohol level of 0.02% or higher while driving.
ground_truth: September 1, 1986
sub_queries: Which place does Driftless exist in? Answer: Wisconsin
when did the drinking age change to 21 in Wisconsin Answer: September 1, 1986