Question: what is the area code for cincinnati, in the state Bluffton Airport is located?

full_context: Document 1: Purdue University Airport: Purdue University Airport is a public-use airport in Tippecanoe County, Indiana, United States. Owned by Purdue University, the airport is southwest of the central business district of Lafayette, in West Lafayette. Because of the heavy traffic generated by Purdue University and its flight programs, Purdue University Airport is one of the busiest airports in Indiana, second only to Indianapolis International Airport.
Document 2: Area codes 740 and 220: North American Area code 740 is a telephone area code serving southeastern and central Ohio. (Columbus and rate centers in Franklin County use the 614 area code.) 740 is the area code in the Ohio cities of Athens, Belpre, Chillicothe, Circleville, Coshocton, Delaware, Gallipolis, Heath, Ironton, Jackson, Lancaster, Laurelville, Logan, Marietta, Marion, Mount Vernon, Nelsonville, Newark, Newcomerstown, Pataskala, Portsmouth, Rockbridge, Steubenville, Washington Court House, Zanesville, Shadyside and surrounding areas.
Document 3: Seven-digit dialing: The initial 86 area codes were assigned in 1947 as routing codes for operator calls; the first cross-country Bell System direct distance dial call was made in 1951. The system was based on fixed - length numbers; a direct - dial long distance call consisted of a three - digit area code and a seven - digit local number. Numbers in 2L + 4N cities (such as Montréal and Toronto) were systematically lengthened to seven digits in the 1950's, a few exchanges at a time, so that all local numbers were seven digits when direct distance dialling finally came to town.
Document 4: Bluffton, Texas: Bluffton is an unincorporated community in Llano County, Texas, United States. According to the Handbook of Texas, the community had an estimated population of 75 in 2000. The population report in 2011 was 269.
Document 5: Palm Beach County Glades Airport: Palm Beach County Glades Airport , also known as Pahokee Airport, is a county-owned, public-use airport in Palm Beach County, Florida, United States. It is located three nautical miles (6 km) southwest of the central business district of Pahokee, Florida. The airport is owned by Palm Beach County and operated by the Palm Beach County Airports Department. It is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a "general aviation" facility.
Document 6: Fremont Airport: Fremont Airport is a public-use airport located two nautical miles (4 km) southwest of the central business district of Fremont, a city in Sandusky County, Ohio, United States. It is privately owned by Fremont Airport LLC.
Document 7: Bluffton Airport: Bluffton Airport is a public use airport located one nautical mile (1.85 km) southeast of the central business district of Bluffton, in Hancock County, Ohio, United States. It is owned by the Village of Bluffton. According to the FAA's National Plan of Integrated Airport Systems for 2009–2013, it is categorized as a "general aviation" facility.
Document 8: Area codes 208 and 986: Area codes 208 and 986 are the North American telephone area codes for all of Idaho. 208 is the main area code, and is one of the 86 original area codes created in 1947. It was Idaho's sole area code until 2017, when 986 was added as an overlay for the entire state.
Document 9: Cleveland Hopkins International Airport: Cleveland Hopkins International Airport (IATA: CLE, ICAO: KCLE, FAA LID: CLE) is a public airport located nine miles (14 km) southwest of the central business district of Cleveland, Cuyahoga County, Ohio, United States and adjacent to NASA's Glenn Research Center, one of NASA's ten major field centers. It is the primary airport serving Northeast Ohio, the largest and busiest airport in Ohio, and the 43rd busiest airport in the United States by passenger number. It is also the only airport in Ohio that offers nonstop transatlantic flights to Europe. Greater Cleveland is also served by Burke Lakefront Airport and Akron - Canton Regional Airport. Cleveland Hopkins and Cleveland Burke Lakefront Airport together comprise the Cleveland Airport System, operated by the City of Cleveland's Department of Port Control.
Document 10: List of Ohio area codes: Code Created Region 216 1947 Cleveland (October 1947) 234 2000 Akron, Canton, Youngstown, and Warren, overlay with 330 330 Akron, Canton, Youngstown, and Warren, overlay with 234 380 2016 Columbus, overlay with 614 (February 27, 2016) 419 1947 Northwest and north central Ohio including Toledo, Sandusky, and Ashland, overlay with 567 (October, 1947) 440 1997 Part of Northeast Ohio including parts of Cleveland (August 16, 1997) 513 1947 Southwest Ohio including Cincinnati (October, 1947) 567 1947 Northwest and north central Ohio including Toledo, Sandusky, and Ashland, overlay with 419 (January 1, 2002) 614 1947 Columbus (October, 1947) 740 1997 Central and southeastern Ohio except Columbus (December 6, 1997) 220 1997 Central and southeastern Ohio except Columbus (December 6, 1997) 937 Southwestern part of Ohio including Springfield, Dayton, public parts of Wright - Patterson Air Force Base, and areas north of Cincinnati (September 28, 1996)
Document 11: Area codes 304 and 681: North American telephone area code 304 was established October 1947 as one of the original area codes, and serves all of the U.S. state of West Virginia. It was overlaid with area code 681, effective March 28, 2009.
Document 12: Area codes 978 and 351: Area code 978 was created as a split from area code 508 on September 1, 1997 and covers north central and most of northeastern Massachusetts (LATA code 128). Use of 978 became mandatory February 1, 1998. Prior to when this area was served by 508 (July 1988), it was served only by the 617 area code, along with the rest of the eastern two - thirds of the state. 351 has been sharing the service area since May 2, 2001. Since then, 10 digit local dialing is mandatory.
Document 13: Orangeburg Municipal Airport: Orangeburg Municipal Airport is a city-owned, public-use airport located two nautical miles (4 km) south of the central business district of Orangeburg, a city in Orangeburg County, South Carolina, United States. It is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a "general aviation" facility. The airport does not have scheduled commercial airline service.
Document 14: Area code 607: North American area code 607 is a state of New York telephone area code servicing parts of its Southern Tier (which borders Pennsylvania). It was split from parts of area codes 315 and 716 in 1954. Initially, in the late 1940s, area codes with a middle digit of ``0 ''(x0x - xxx - xxxx) were assigned only to jurisdictions covering an entire state. Along with 507 in Minnesota and 606 in Kentucky, 607 was among the first such area codes to be added to a jurisdiction.
Document 15: Oakland County International Airport: Oakland County International Airport is a county-owned public-use airport located in Waterford Township, Oakland County, Michigan, United States. The airport is located approximately 1 mile from the center of Waterford Township and Oakland County. It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021, in which it is categorized as a non primary commercial service facility.
ground_truth: 513
sub_queries: In which state is Bluffton Airport located? Answer: Ohio
what is the area code for cincinnati Ohio Answer: 513