Question: What's the area code for Cincinnati, in the state where the Eighteenth District School is located?

full_context: Document 1: Mariemont City School District: The Mariemont City School District is located east of Cincinnati, Ohio, United States and includes the villages of Fairfax, Terrace Park, Mariemont, and the unincorporated areas of Plainville and Williams' Meadow. The district can trace its founding to April 14, 1879.
Document 2: Cincinnati Zoo Historic Structures: The Cincinnati Zoo Historic Structures are a collection of historically significant buildings at the Cincinnati Zoo in Cincinnati, Ohio, United States. They were designated a National Historic Landmark on February 27, 1987.
Document 3: Eighteenth District School: Eighteenth District School is a registered historic building in Cincinnati, Ohio, listed in the National Register on March 3, 1980.
Document 4: 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 5: Harris Dental Museum: The museum structure is a small brick building on Bainbridge's western side. One story tall with an ell on one side, it is covered with an asphalt roof. In recognition of its historic significance, the dental school was listed on the National Register of Historic Places in 1973 under the name of "Dr. John Harris Dental School." One of four places in or around Bainbridge to be included on the Register, it has been rated as being significant throughout Ohio's history.
Document 6: South Center School House: The South Center School House is a historic one-room school house on Washington Mountain Road in Washington, Massachusetts. Built in 1880, it is the town's only surviving district school building. It was listed on the National Register of Historic Places in 1986.
Document 7: 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 8: 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 9: 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 10: 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 11: Cincinnatian Hotel: The Cincinnatian Hotel is a registered historic building in Downtown Cincinnati, Ohio, listed in the National Register on March 3, 1980.
Document 12: National Register of Historic Places listings in Columbus, Ohio: This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Columbus, Ohio, United States. Latitude and longitude coordinates are provided for many National Register properties and districts; these locations may be seen together in an online map.
Document 13: 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 14: 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 15: Nathaniel Ropes Building: The Nathaniel Ropes Building is a historic commercial building in downtown Cincinnati, Ohio, United States. Located on Main Street near the Hamilton County Courthouse, this 1882 building has been named a historic site.
ground_truth: 513
sub_queries: What state is Eighteenth District School located? Answer: Ohio
what is the area code for cincinnati Ohio Answer: 513