Question: How old do you have to be to buy a handgun in the state to the north of Missouri?

full_context: Document 1: Gun laws in Texas: The Texas handgun carry permit was previously called a ``Concealed Handgun License ''or CHL. This has changed on Jan 1. 2016 to LTC`` License To Carry'' and at the same time the laws changed to include ``Open Carry ''. Permits are issued on a non-discretionary (`` shall - issue'') basis to all eligible, qualified applicants. Texas has full reciprocity agreements with 30 states, not including Vermont (which is an ``unrestricted ''state and neither issues nor requires permits), most of these having some residency restrictions (the holder must either be a resident of Texas or a non-resident of the reciprocal state for the Texas license to be valid in that state). Texas recognizes an additional 11 states' concealed - carry permits unilaterally; those states do not recognize Texas' own permit as valid within their jurisdiction, usually due to some lesser requirement of the Texas permit compared to their own.
Document 2: Gun laws in Ohio: In April 2004, Ohio became the 46th state to legalize concealed carry and its statute went into effect. The law (Ohio Revised Code (O.R.C.) 2923.12, et seq.) allows persons 21 and older to receive a concealed handgun license provided that they receive a minimum of 8 hours of handgun training (6 hours of classroom instruction and 2 hours of range time) from a certified instructor, demonstrate competency with a handgun through written and shooting tests, pass a criminal background check, and meet certain residency requirements (non-residents who work in Ohio will be allowed to obtain licenses as of March 23, 2015).
Document 3: Missouri River: The Missouri makes a bend to the southeast as it winds through the Great Plains, receiving the Niobrara River and many smaller tributaries from the southwest. It then proceeds to form the boundary of South Dakota and Nebraska, then after being joined by the James River from the north, forms the Iowa -- Nebraska boundary. At Sioux City the Big Sioux River comes in from the north. The Missouri flows south to the city of Omaha where it receives its longest tributary, the Platte River, from the west. Downstream, it begins to define the Nebraska -- Missouri border, then flows between Missouri and Kansas. The Missouri swings east at Kansas City, where the Kansas River enters from the west, and so on into north - central Missouri. To the east of Kansas City, the Missouri receives, on the left side, the Grand River. It passes south of Columbia and receives the Osage and Gasconade Rivers from the south downstream of Jefferson City. The river then rounds the northern side of St. Louis to join the Mississippi River on the border between Missouri and Illinois.
Document 4: Tennessee: Tennessee (i/tɛnᵻˈsiː/) (Cherokee: ᏔᎾᏏ, Tanasi) is a state located in the southeastern United States. Tennessee is the 36th largest and the 17th most populous of the 50 United States. Tennessee is bordered by Kentucky and Virginia to the north, North Carolina to the east, Georgia, Alabama, and Mississippi to the south, and Arkansas and Missouri to the west. The Appalachian Mountains dominate the eastern part of the state, and the Mississippi River forms the state's western border. Tennessee's capital and second largest city is Nashville, which has a population of 601,222. Memphis is the state's largest city, with a population of 653,450.
Document 5: Missouri's 8th congressional district: Missouri's 8th Congressional District is one of 435 congressional districts in the United States and one of eight congressional districts in the state of Missouri. The district encompasses rural Southeast Missouri and South Central Missouri as well as some counties in Southwest Missouri. The district stretches from the Bootheel in the south to the St. Louis southern exurbs of Festus, Hillsboro, and surrounding areas in the Lead Belt; it ranges in the east to counties along the Mississippi River and in the west to counties along the Ozark Plateau near Branson.
Document 6: Geography of Missouri: Missouri river from its mouth at St. Louis to Columbia. This also corresponds to the southernmost extent of glaciation during the Pre-Illinoian Stage which destroyed the remnant plateau to the north but left the ancient landforms to the south unaltered. The Ozark boundary runs southwestward from there towards Joplin at the southeast corner of Kansas. The boundary between the Ozark and lowland regions runs southwest from Cape Girardeau on the Mississippi River to the Arkansas border just southwest of Poplar Bluff. Missouri borders eight other US States, more than any other state except Tennessee, which also borders eight states.
Document 7: Geography of Illinois: Illinois is in the midwestern United States. Surrounding states are Wisconsin to the north, Iowa and Missouri to the west, Kentucky to the south, and Indiana to the east. Illinois also borders Michigan, but only via a northeastern water boundary in Lake Michigan. Nearly the entire western boundary is the Mississippi River, except for a few areas where the river has changed course. Illinois' southeastern and southern boundary is along the Wabash River and the Ohio River. Whereas, its northern boundary and much of its eastern boundary are straight survey (longitudinal and latitudinal) lines. Illinois has a maximum north - south distance of 390 miles (630 km) and 210 miles (340 km) east - west. Its total area is 57,918 square miles (150,010 km).
Document 8: Gun laws in Indiana: Indiana is a ``shall issue ''state for the License To Carry a Handgun. A license to carry will be issued to individuals age 18 or older who meet a number of legal requirements. Currently both limited term and unlimited lifetime licenses are available.
Document 9: Missouri: Missouri is landlocked and borders eight different states as does its neighbor, Tennessee. No state in the U.S. touches more than eight. Missouri is bounded by Iowa on the north; by Illinois, Kentucky, and Tennessee across the Mississippi River on the east; on the south by Arkansas; and by Oklahoma, Kansas, and Nebraska (the last across the Missouri River) on the west. Whereas the northern and southern boundaries are straight lines, the Missouri Bootheel protrudes southerly into Arkansas. The two largest rivers are the Mississippi (which defines the eastern boundary of the state) and the Missouri River (which flows from west to east through the state) essentially connecting the two largest metros of Kansas City and St. Louis.
Document 10: Gun laws in Tennessee: A license is required to carry a loaded handgun either openly or concealed. Such permits are issued through the Department of Safety to qualified residents 21 years or 18 years old if the applicant is active duty, reservist, guardsman, or honorably discharged from their branch of service, DD - 214 must mention 'pistol qualification' in order to be exempt from 8 hour safety course must have a valid military ID. The length of the term for the initial license is determined by the age of the applicant. If renewed properly and on time, the license is renewed every 5 years. Tennessee recognizes any valid, out - of - state permit for carrying a handgun as long as the permittee is not a resident of Tennessee. Nonresidents are not issued permits unless they are regularly employed in the state. Such persons are then required to obtain Tennessee permits even if they have home state permits unless their home state has entered into a reciprocity agreement with Tennessee. Permittees may carry handguns in most areas except civic centers, public recreation buildings and colleges. Businesses or landowners posting ``no carry ''signs may prohibit gun carry on any portion of their properties.
Document 11: Gun laws in Iowa: A Permit To Acquire (PTA), obtained from the sheriff of the county of the applicant's residence, is required when purchasing or otherwise acquiring a handgun, either from a dealer or from a private party. A Permit To Acquire shall be issued to qualified applicants aged 21 or older. The PTA becomes valid three days after the date of application, and is valid for one year. A PTA is not required when purchasing an antique handgun, defined as one made in or before 1898 and including post-1898 replicas of matchlock, flintlock, or percussion cap pistols.
Document 12: Gun laws in Arizona: Arizona gun laws are found mostly in Title 13, Chapter 31 of the Arizona Revised Statutes. There is no registration or licensing of non-NFA firearms in Arizona. Section 13 - 3108 subsection B prohibits any political subdivision of the state from enacting any laws requiring licensing or registration. According to state law, a person must be 18 years of age to purchase any non-NFA firearm from any source; however, there is a federal age limit of 21 years on handgun purchases from federal firearms licensees.
Document 13: Mississippi: Mississippi ( (listen)) is a state located in the southeastern region of the United States. Mississippi is the 32nd largest and 34th-most populous of the 50 United States. Mississippi is bordered to north by Tennessee, to the east by Alabama, to the south by the Gulf of Mexico, to the southwest by Louisiana, and to the northwest by Arkansas.  Mississippi's western boundary is largely defined by the Mississippi River.  Jackson is both the state's capital and largest city.  Greater Jackson, with an estimated population of 580,166 in 2018, is the most populous metropolitan area in Mississippi and the 95th-most populous in the United States.
Document 14: Gun laws in Washington: As a general rule, a person may legally open - carry in Washington state in any place it is legal to possess a loaded handgun, as long as it does not manifest ``an intent to intimidate another or (warrant) alarm for the safety of other persons. ''To open - carry a handgun in a vehicle (e.g, car, bus, etc...) a person must have a valid concealed pistol license. The county sheriff or city police chief shall issue a concealed pistol license to any applicant, age 21 or older, who meets certain requirements, including no felony convictions, no misdemeanor domestic violence convictions, and no outstanding warrants. Open carrying of firearms is not prohibited by law, although trouble with some law enforcement agencies has been encountered while open carrying in the past, most notably in a case in Ellensburg, Washington.
Document 15: Gun laws in Michigan: At the age of 18 or up, it is legal to buy a pistol with a purchase license from a private seller, at the age of 21, it is legal to buy a firearm from a Federally licensed (FFL) dealer. No purchase license is required to purchase a long gun (a firearm that is more than 26 inches long) in Michigan. According to state law, a long gun may be purchased by anyone aged 18 or over who is not subject to restrictions based on criminal history, mental health history, or other disqualifying factor. A person must be at least 18 years old to purchase a long gun from a federal dealer or a private seller under Michigan law.
ground_truth: 21 or older.
sub_queries: Which state is to the north of Missouri? Answer: Iowa
how old do you have to be to buy a handgun in Iowa Answer: 21 or older.