Question: What is the population of the small town with an Air Force Base 7 mi northeast of Sacramento, California?

full_context: Document 1: McClellan Park, California: McClellan Park is a census-designated place in Sacramento County, California. McClellan Park sits at an elevation of 69 ft . The 2010 United States census reported McClellan Park's population was 743. It is the site of the former McClellan Air Force Base, closed by the federal government in 2003.
Document 2: Mather, Sacramento County, California: Mather is a census-designated place in Sacramento County, California. Mather sits at an elevation of 108 ft . The 2010 United States census reported Mather's population was 4,451. It is the site of the former Mather Air Force Base, closed by the federal government in 1993.
Document 3: 337th Flight Test Squadron: The 337th Flight Test Squadron (337 FLTS) was most recently part of the 46th Test Wing and based at McClellan Air Force Base, California. It performed depot acceptance testing until being inactivated with the closure of McClellan AFB on 13 July 2001.
Document 4: Mather Field / Mills (Sacramento RT): Mather Field/Mills is a side platformed Sacramento RT light rail station in Rancho Cordova, California, United States. The station was opened on September 6, 1998, and is operated by the Sacramento Regional Transit District. As part of the Gold Line, it has service to Downtown Sacramento, California State University, Sacramento, Gold River and Folsom. The station is located near the intersection of Mather Field Road and Folsom Boulevard, is served by various RT bus routes and serves the nearby Mather Air Force Base.
Document 5: Sacramento Mather Airport: Sacramento Mather Airport (IATA: MHR, ICAO: KMHR, FAA LID: MHR) , also known as simply Mather Airport, is a county-owned public-use airport located 10 nautical miles (19 km) east of the central business district of Sacramento, in Sacramento County, California, United States. It is located on the site of the former Mather Air Force Base which was closed in 1993.
Document 6: McClellan Air Force Base: McClellan Air Force Base (1935–2001) is a former United States Air Force base located in the North Highlands area of Sacramento County, 7 mi northeast of Sacramento, California.
Document 7: Fresno Air Attack Base: The Fresno Air Attack Base was established in 1955 By the US Forest Service, Sierra National Forest and is located at the Fresno Yosemite International Airport. The US Forest Service leases office space to the California Department of Forestry and Fire Protection's (CAL FIRE) Fresno/Kings Unit. In 1994, it was completely rebuilt to become a model modern AirTanker Base which includes a modern interagency communication/command center.
Document 8: Williams Air Force Base: Williams Air Force Base is a former United States Air Force (USAF) base, located in Maricopa County, Arizona east of Chandler, and about 30 mi southeast of Phoenix. The area has since been annexed by the city of Mesa. It is a designated Superfund site due to a number of soil and groundwater contaminants.
Document 9: McClellan–Palomar Airport: McClellan–Palomar Airport (Palomar Airport) (IATA: CLD, ICAO: KCRQ, FAA LID: CRQ) is a public airport three miles (5 km) southeast of Carlsbad in San Diego County, California. It is owned by the County of San Diego. The airport is used for both general aviation and commercial aviation. In March 2013 the airport was the fourth-busiest single runway airport in the United States. In August 2017, the airport announced a new commercial airline Cal Jet, would start operating flights in September 2017.
Document 10: Mather Air Force Base: Mather Air Force Base (Mather AFB) was a United States Air Force Base, which was closed in 1993. It was located 12 mi east of Sacramento, on the south side of U.S. Route 50 in Sacramento County, California. Mather Field was one of 32 Air Service training camps established after the United States entry into World War I in April 1917.
Document 11: McClellan AFB Annex: McClellan Air Force Base Annex #1 ("McClellan Anx #1") was a military installation near McClellan Air Force Base in Contra Costa County, California, that was active from 28 November 1951 to 2 July 1956. Strategic Air Command operated an (call sign "Sacramento Bomb Plot") just outside the base at Whitney and Eastern Avenues.
Document 12: K. I. Sawyer Air Force Base: K. I. Sawyer Air Force Base is a decommissioned U.S. Air Force installation in Marquette County, Michigan, south of the city of Marquette. Near the center of Michigan's Upper Peninsula, the base operated for nearly forty years and closed in 1995. The county airport, Sawyer International, now occupies a portion of the base and has scheduled airline flights and some general aviation activity. The area of the former base is now an unincorporated community and a census-designated place for statistical purposes known as K. I. Sawyer AFB
Document 13: McConnell Air Force Base: McConnell Air Force Base (IATA: IAB, ICAO: KIAB, FAA LID: IAB) is a United States Air Force base located four miles (6 km) southeast of the central business district of Wichita, a city in Sedgwick County, Kansas, United States. The base was named in honor of Wichita brothers Fred and Thomas McConnell, both Air Force pilots and World War II veterans. It is the home of Air Mobility Command's 22d Air Refueling Wing (22 ARW), Air Force Reserve Command's 931st Air Refueling Wing (931 ARW), and the Kansas Air National Guard's 184th Intelligence Wing (184 IW).
Document 14: March Air Reserve Base: March Air Reserve Base (IATA: RIV, ICAO: KRIV, FAA LID: RIV) (March ARB), previously known as March Air Force Base (March AFB) is located in Riverside County, California between the cities of Riverside and Moreno Valley. It is the home to the Air Force Reserve Command's 4th Air Force (4 AF) Headquarters and the host 452d Air Mobility Wing (452 AMW), the largest air mobility wing of the 4th Air Force. In addition to multiple units of the Air Force Reserve Command supporting Air Mobility Command, Air Combat Command and Pacific Air Forces, March ARB is also home to units from the Army Reserve, Navy Reserve, Marine Corps Reserve, California Air National Guard and the California Army National Guard. For almost 50 years, March AFB was a Strategic Air Command base during the Cold War.
Document 15: Aerospace Museum of California: The Aerospace Museum of California is an aviation museum located in North Highlands, California on the grounds of the former McClellan Air Force Base. It features displays of authentic military and civilian aircraft as well as space vehicle replicas. It preserves the history and mission of this former base as well as those of neighboring bases like Beale (active) and Mather (closed) Air Force Bases. McClellan Air Force Base closed in 2001 and became McClellan Airfield, a civil aviation airport.
ground_truth: 743