Question: What age is required for handgun purchase in the state where Harrison Township is located?

full_context: Document 1: Harrison Township, Dearborn County, Indiana: Harrison Township is one of fourteen townships in Dearborn County, Indiana. As of the 2010 census, its population was 3,204 and it contained 1,338 housing units.
Document 2: Howard County, Iowa: Howard County is a county located in the US state of Iowa. As of the 2010 census, the population was 9,566. The county seat is Cresco. The county was founded in 1851; it was named for General Tilghman Ashurst Howard, a Representative of Indiana.
Document 3: 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 4: Harrison Township, Wayne County, Indiana: Harrison Township is one of fifteen townships in Wayne County, Indiana, United States. As of the 2010 census, its population was 392 and it contained 138 housing units.
Document 5: Harrison Township, Union County, Indiana: Harrison Township is one of six townships in Union County, Indiana, United States. As of the 2010 census, its population was 416 and it contained 182 housing units.
Document 6: 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 7: Howard, South Dakota: Howard is a city in Miner County, South Dakota, United States. The population was 858 at the 2010 census. It is the county seat and most populous city in Miner County.
Document 8: Cedar Rapids, Iowa: As of the 2010 United States Census, the city population was 126,326. The estimated population of the three - county Metropolitan Statistical Area, which includes the nearby cities of Marion and Hiawatha, was 255,452 in 2008. Cedar Rapids is an economic hub of the state, located in the core of the Interstate 380.
Document 9: Harrison Township, Howard County, Indiana: Harrison Township is one of 11 townships in Howard County, Indiana, United States. As of the 2010 census, its population was 9,489 and it contained 4,169 housing units.
Document 10: 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 11: Corydon, Iowa: Corydon is a city in Wayne County, Iowa, United States. The population was 1,585 in the 2010 census, a decline from 1,591 in the 2000 census. It is the county seat of Wayne County.
Document 12: 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 13: Center Township, Howard County, Indiana: Center Township is one of eleven townships in Howard County, Indiana, United States. As of the 2010 census, its population was 45,275 and it contained 22,736 housing units.
Document 14: 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.
Document 15: Harrison Township, Pulaski County, Indiana: Harrison Township is one of twelve townships in Pulaski County, Indiana, United States. As of the 2010 census, its population was 628 and it contained 288 housing units.
ground_truth: 21 or older.
sub_queries: Harrison Township >> located in the administrative territorial entity Answer: Howard County
Howard County >> located in the administrative territorial entity Answer: Iowa
how old do you have to be to buy a handgun in Iowa Answer: 21 or older.