Question: What is the population of Williston in the state that encompasses KMAV-FM?

full_context: Document 1: KRBI-FM: KRBI-FM (105.5 FM, "River 105") is an American radio station licensed to serve the community of St. Peter, Minnesota and broadcasting to the Mankato area and the Minnesota River Valley. They currently air a classic hits music format.
Document 2: KMNV: KMNV (1400 AM) is a radio station in the Twin Cities area of Minnesota that airs a Spanish-language music and entertainment format. KMNV's studios are located on 27th Avenue South and East Lake Street in Minneapolis. Its transmitter is located near the Mississippi River in St. Paul.
Document 3: KMAR-FM: KMAR-FM (95.9 FM) is an American radio station licensed to serve the community of Winnsboro, Louisiana. The station airs the syndicated Westwood One programming True Country in addition to locally produced programming.
Document 4: 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 5: 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 6: 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 7: KMAV-FM: KMAV-FM (105.5 FM) is a radio station in Mayville, North Dakota, serving the Red River Valley of eastern North Dakota and northwest Minnesota with a country music format on weekdays and oldies format on weekends. KMAV is known as "Your Sports Leader in the Red River Valley" in reference of their coverage of local high school sport events.
Document 8: KMSR: KMSR (1520 AM) is a radio station in Mayville, North Dakota, serving the Red River Valley of eastern North Dakota and northwest Minnesota. KMSR, also known as Sports Radio 1520, is on the air in the daytime only, so it signs off at sunset, and signs on again at sunrise.
Document 9: KMND: KMND (1510 AM), branded as "Fox Sports 1510 KMND", is a radio station that serves the Midland–Odessa metropolitan area with Fox Sports Radio talk shows, the WinningEDGE radio show, and a weekly sports update on Pro Football and Basketball. It also simulcasts the programming on 99.5 FM. The station is under ownership of Townsquare Media.
Document 10: 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 11: 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 12: 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 13: 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 14: 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 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: KMAV-FM >> located in the administrative territorial entity Answer: North Dakota
what is the population of williston North Dakota Answer: 26,977