Question: What is the population of Williston in the state where KCAD is based?

full_context: Document 1: Zahl, North Dakota: Zahl is an unincorporated community in northwestern Williams County, North Dakota, United States. It lies along North Dakota Highway 50 north of the city of Williston, the county seat of Williams County. Its elevation is 2,014 feet (614 m). Although it is unincorporated, it has a post office, with the ZIP code of 58856.
Document 2: KKSY-FM: KKSY-FM (96.5 FM, "96.5 Kiss Country") is a 100,000 watt radio station in Cedar Rapids, Iowa. It is a country music formatted station owned by iHeartMedia, Inc..
Document 3: Montana: The United States Census Bureau estimates that the population of Montana was 1,032,949 on July 1, 2015, a 4.40% increase since the 2010 United States Census. The 2010 census put Montana's population at 989,415 which is an increase of 43,534 people, or 4.40 percent, since 2010. During the first decade of the new century, growth was mainly concentrated in Montana's seven largest counties, with the highest percentage growth in Gallatin County, which saw a 32 percent increase in its population from 2000-2010. The city seeing the largest percentage growth was Kalispell with 40.1 percent, and the city with the largest increase in actual residents was Billings with an increase in population of 14,323 from 2000-2010.
Document 4: Williston, Florida: Williston is a city in Levy County, Florida, United States. As of the 2010 census it had a population of 2,768. The city was established before 1885 by J. M. Willis, who named it after himself.
Document 5: KMXA-FM: KMXA-FM "Mix 99.9" is an Adult Contemporary radio station in Minot, North Dakota owned by iHeartMedia, Inc.. During the Christmas season "Mix 99.9" plays continuous Christmas music. The station begins playing the Christmas music the day after Thanksgiving and runs until Christmas Day.
Document 6: Williston, North Dakota: Williston is a city in and the county seat of Williams County, North Dakota, United States. The 2010 census gave its population as 14,716, and the Census Bureau gave the 2015 estimated population as 26,977, making Williston the sixth largest city in North Dakota. The North Dakota oil boom is largely responsible for the sharp increase in population.
Document 7: KDLO-FM: KDLO-FM (96.9 FM) is a radio station broadcasting a country music format serving Watertown, South Dakota, United States. The station is currently owned by Alpha Media, through licensee Digity 3E License, LLC. The 100,000 kilowatt 1600 ft tower is located in Garden City, South Dakota.
Document 8: KDWG: KDWG (90.9 FM, "90.9 The Dawg") is a radio station licensed to serve Dillon, Montana, United States. The station is owned by The University of Montana Western. It airs a Variety format.
Document 9: Fargo, North Dakota: Fargo is the most populous city in the state of North Dakota, accounting for over 15% of the state population. Fargo is also the county seat of Cass County. According to the 2016 United States Census estimates, its population was 120,762, making it the 229th-most populous city in the United States. Fargo, along with its twin city of Moorhead, Minnesota, as well as the adjacent cities of West Fargo, North Dakota and Dilworth, Minnesota, form the core of the Fargo - Moorhead, ND - MN Metropolitan Statistical Area, which in 2016 contained a population of 238,124. In 2014, Forbes magazine ranked Fargo as the fourth fastest - growing small city in the United States.
Document 10: KLTC: KLTC (1460 AM, "Big Country To Boot KLTC 1460 ") is a radio station broadcasting an Information/classic country format serving Western and Southwestern North Dakota, Southeastern Montana and Northwestern South Dakota and Northeast Wyoming from Dickinson, North Dakota. The station is currently owned by iHeartMedia, Inc..
Document 11: Wilton, North Dakota: Wilton is a city in Burleigh and McLean counties in the State of North Dakota. It is part of the "Bismarck, ND Metropolitan Statistical Area" or "Bismarck-Mandan". The population was 711 at the 2010 census. Founded in 1899, Wilton was named by General W. D. Washburn after the town of Wilton in his native state of Maine.
Document 12: KJJQ: KJJQ's transmitter is located in the town of Volga, South Dakota, but the studios are in the nearby city of Brookings. Known as The Ranch AM 910, the station has a broad range transmitting across eastern South Dakota and western Minnesota, reaching the cities of Yankton, South Dakota, Webster, South Dakota, Chamberlain, South Dakota, Marshall, Minnesota, Olivia, Minnesota, and the communities between these points. The station was formerly in a historic train depot and went by the name "Depot Radio". In 2005, the depot was sold and KJJQ relocated to the building now housing the other four commercial radio stations in Brookings.
Document 13: KCLV-FM: KCLV-FM (99.1 FM, "Country 99") is a radio station licensed to serve Clovis, New Mexico. The station is owned by Zia Broadcasting Company. It airs a Country music format.
Document 14: KCAD: KCAD (99.1 FM, "KC-99 Roughrider Country") is a radio station broadcasting a Hot Country format serving Western and Central North Dakota, Parts of Northwest South Dakota and Eastern Montana from Dickinson, North Dakota. The station is currently owned by iheart media. KC-99 Roughrider Country signed on the air in 1996 and was the First Country FM Station in Southwestern North Dakota.
Document 15: Dallas: Dallas (/ ˈdæləs /) is a city in the U.S. state of Texas. It is the most populous city in the Dallas -- Fort Worth metroplex, which is the fourth most populous metropolitan area in the United States. The city's population ranks ninth in the U.S. and third in Texas after Houston and San Antonio. The city's prominence arose from its historical importance as a center for the oil and cotton industries, and its position along numerous railroad lines. The bulk of the city is in Dallas County, of which it is the county seat; however, sections of the city are located in Collin, Denton, Kaufman, and Rockwall counties. According to the 2010 United States Census, the city had a population of 1,197,816. The United States Census Bureau's estimate for the city's population increased to 1,317,929 as of July 1, 2016.
ground_truth: 26,977
sub_queries: KCAD >> located in the administrative territorial entity Answer: North Dakota
what is the population of williston North Dakota Answer: 26,977