Question: What is the area code for the Cincinnati in the state where Langdon House is located?

full_context: Document 1: Doan House: The Doan House is a historic residence in the city of Wilmington, Ohio, United States. Constructed in the middle of the nineteenth century for a local medical official, it was for many years the home of one of the city's prominent lawyers. The house's prominent location at the city's edge and its distinctive architecture have made it a local landmark, and it has been designated a historic site.
Document 2: 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 3: 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 4: Joseph C. Hays House: The Joseph C. Hays House at 103-105 West Main Street in Sharpsburg, Maryland, United States was originally built in 1823 as a three-bay side hall double-parlor house in the Federal style. It was soon expanded to the east with a two-bay parlor and one commercial bay. The east parlor entered commercial use during the mid-19th century as a dry goods store operated by Benjamin F. Cronise. "Circa" 1920 a storefront was added and a copper front was applied with BANK lettered under a central pediment, behind a marquee.
Document 5: Whitby Mansion: The Whitby Mansion is a historic mansion in Sidney, Ohio, United States. Built in 1890, it was originally the home of W.H.C. Goode, a Sidney industrialist. Descended from one of the First Families of Virginia, Goode first purchased property in the vicinity of Sidney in 1849. Having gained complete ownership of the leading steel scraper manufacturing company in the United States in 1877, Goode began to build his mansion on Sidney's northern side in the late 1880s. The resulting mansion, designed by an unknown architect, features massive stone walls that are topped with a slate roof. Elements of the Jacobethan and Châteauesque styles are combined with the Tudor Revival style of architecture. By the mid-1970s, the mansion had ceased to be a house; it had been purchased by The Way International and converted into a historic archive and art museum. Today, the property is owned by GreatStone Castle Resorts, which operates it as a bed and breakfast.
Document 6: Joseph A. Hemann House: The Joseph A. Hemann House in Cincinnati, Ohio, was built in 1870 by Joseph A. Hemann (1816-1897) and served as his residence for about ten years. It is located in Hamilton County in the neighborhood of Clifton on the corner of West McMillan and Hollister. Mr. Hemann was the founder of the Cincinnati Volksfreund in 1850.
Document 7: Langdon House: The Langdon House is a historic house on the eastern side of Cincinnati, Ohio, United States. Located along Eastern Avenue, it is a frame house with weatherboarded walls, built in the Steamboat Gothic style. It was erected in 1855 in the village of Columbia, which has since been annexed to the city of Cincinnati. Seven years after it was constructed, its owner, Henry Langdon, joined the 79th Ohio Infantry to fight in the Civil War. After his return in 1865, Langdon returned to his Columbia house; there he maintained a medical practice until his 1876 death.
Document 8: 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 9: Charles Kent House: The Charles Kent House, also known as the Palmer House, is a historic structure in Kent, Ohio, United States. It has been listed on the National Register of Historic Places since February 23, 1978. An example of Gothic Revival architecture, the house also features elements of the Greek Revival and Carpenter Gothic architectural styles. It is at 125 North Pearl Street in central Kent, immediately north of the West Main Street District. It was built in 1843 as the home of Charles Kent, son of Zenas Kent and brother of Marvin Kent, the namesake of the city of Kent. In 1909 it was moved by owner Henry Green north of its original location along West Main Street to the site on North Pearl Street. Martin L. Davey, who would later serve as mayor of Kent, followed by U.S. Representative, and eventually as Governor of Ohio, persuaded the owner to move the house to avoid demolition.
Document 10: 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 11: 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 12: Madison Historic District (Madison, Indiana): Many of the prominent buildings in the district were built by Madison-native-architect Francis Costigan, who favored the Greek Revival style. Two of these are National Historic Landmarks: the Lanier Mansion, and the Charles L. Shrewsbury House. The Lanier Mansion was the former home of James Lanier, who lent money to governor Oliver P. Morton to run the Indiana state government to circumvent the legislative process between 1862-1865. The Shrewsbury-Windle House was built for steamboat captain Charles Shrewsbury, who would later become a mayor of Madison. Costigan, himself, built his home in the district, and it is considered one of the best uses of a narrow lot by modern architects. A thirty-foot parlor is considered the highlight of the House.
Document 13: 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 14: 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 15: Columbus Pump House: The Columbus Pump House, which is also known as the Columbus Power House, and the Senior Center, was designed by architect Harrison Albright and completed in 1903. In 2016 the building was renovated to become a restaurant for the Upland Brewing Company. The building stands on the banks of the East Fork of the White River at the foot of Second Street in Columbus, IN, Indiana. From 1903 to 1951 it served as the city's water works and pumped water from the river for domestic use; it also produced electricity for the city's street lighting. The city sold the property in 1952 and it was renovated to become Southern Machine Company. With a 1976 renovation it became the home to the "Senior Center", which used the building until 2011 when that group relocated into the newly built Mill Race Center. It is currently a brewpub operated by Upland Brewing Company.
ground_truth: 513
sub_queries: Which state is Langdon House located? Answer: Ohio
what is the area code for cincinnati Ohio Answer: 513