Question: Which one of the two conferences of the National Football League (NFL) does champion Washington Redskins play for?

Context articles: Eagles–Redskins rivalry
American Football Conference
Super Bowl XVIII
List of NFC champions
Super Bowl VII
Super Bowl XXVI
Super Bowl XXII
Super Bowl XVII
National Football Conference
Washington Redskins

The Eagles–Redskins rivalry is a rivalry between the Philadelphia Eagles and Washington Redskins of the National Football League.
 The rivalry began in 1934, during the time the Redskins played in Boston.
 The Washington Redskins lead in all-time series 86–74–6.
 The Redskins have won 3 Super Bowls and 2 NFL Championships, while the Eagles have won 3 NFL Championships.
 The rivalry is one of the most heated rivalries in the NFL, and has featured some of the most memorable moments in NFL history.
 The rivalry is most notable for the "Body Bag Game", where the Eagles knocked out eight Redskins players in a game in 1990.
The American Football Conference (AFC) is one of the two conferences of the National Football League (NFL), the highest professional level of American football in the United States.
 This conference and its counterpart, the National Football Conference (NFC), currently contain 16 teams each, making up the 32 teams of the NFL.
 Both conferences were created as part of the 1970 merger with the rival American Football League (AFL), with all ten of the former AFL teams and three NFL teams forming the AFC, and the remaining thirteen NFL clubs forming the NFC.
 A series of league expansions and division realignments have occurred since the merger, thus making the current total 16 clubs per each conference.
Super Bowl XVIII was an American football game between the National Football Conference (NFC) champion Washington Redskins and the American Football Conference (AFC) champion Los Angeles Raiders to decide the National Football League (NFL) champion for the 1983 season.
 The Raiders defeated the Redskins by the score of 38–9.
 The Raiders, coached by Tom Flores,' 38 points and their 29-point margin of victory broke Super Bowl records; it still remains the most points scored by an AFC team in a Super Bowl.
 The game was played on January 22, 1984, at Tampa Stadium in Tampa, Florida, the first time the Super Bowl was held in that city.
 This would be the AFC's last Super Bowl win until Super Bowl XXXII, won by the Denver Broncos.
The National Football Conference (NFC) is one of two conferences within the National Football League (NFL), the American Football Conference (AFC) being the other.
 Prior to 1970, there were two separate professional football leagues, the National Football League and the American Football League (AFL).
 In 1970, the AFL merged with the NFL.
 As part of the merger, the former AFL teams, plus three former NFL teams (the Baltimore Colts, the Cleveland Browns and the Pittsburgh Steelers), were placed into the AFC.
 The remaining former NFL teams were placed in the NFC.
 As of August 14,2017, only the Detroit Lions have not won an NFC championship.
Super Bowl VII was an American football game between the American Football Conference (AFC) champion Miami Dolphins and the National Football Conference (NFC) champion Washington Redskins to decide the National Football League (NFL) champion for the 1972 season.
 The Dolphins defeated the Redskins by the score of 14–7, and became the first and still the only team in NFL history to complete a perfect undefeated season.
 They also remain the only Super Bowl team to be shut out in the second half and still win.
 The game was played on January 14, 1973, at the Los Angeles Memorial Coliseum in Los Angeles, the second time the Super Bowl was played in that city.
 At kickoff the temperature was 84 F , making the game the warmest Super Bowl ever.
Super Bowl XXVI was an American football game between the National Football Conference (NFC) champion Washington Redskins and the American Football Conference (AFC) champion Buffalo Bills to decide the National Football League (NFL) champion for the 1991 season.
 The Redskins defeated the Bills by the score of 37–24, becoming the fourth team after the Pittsburgh Steelers, the Oakland Raiders, and the San Francisco 49ers to win three Super Bowls.
 The Bills became the third team, after the Minnesota Vikings (Super Bowls VIII and IX) and the Denver Broncos (Super Bowls XXI and XXII), to lose back-to-back Super Bowls.
 The game was played on January 26, 1992, at the Hubert H. Humphrey Metrodome in Minneapolis, Minnesota, the first time the city has played host to a Super Bowl (the city will host Super Bowl LII at U.S. Bank Stadium).
Super Bowl XXII was an American football game between the National Football Conference (NFC) champion Washington Redskins and American Football Conference (AFC) champion Denver Broncos to decide the National Football League (NFL) champion for the 1987 season.
 The Redskins defeated the Broncos by the score of 42–10, winning their second Super Bowl.
 The game was played on January 31, 1988 at Jack Murphy Stadium in San Diego, the first time that the Super Bowl was played in that city.
Super Bowl XVII was an American football game between the American Football Conference (AFC) champion Miami Dolphins and the National Football Conference (NFC) champion Washington Redskins to decide the National Football League (NFL) champion for the 1982 season.
 The Redskins defeated the Dolphins by the score of 27–17 to win their first Super Bowl championship.
 The game was played on January 30, 1983 at the Rose Bowl in Pasadena, California.
The National Football Conference (NFC) is one of the two conferences of the National Football League (NFL), the highest professional level of American football in the United States.
 This conference and its counterpart, the American Football Conference (AFC), currently contain 16 teams each, making up the 32 teams of the NFL.
 Both conferences were created as part of the 1970 merger with the rival American Football League (AFL), with all ten of the former AFL teams and three NFL teams forming the AFC while the remaining thirteen NFL clubs formed the NFC.
 A series of league expansions and division realignments have occurred since the merger, thus making the current total 16 clubs per conference.
The Washington Redskins are a professional American football team based in the Washington metropolitan area.
 The Redskins compete in the National Football League (NFL) as a member of the National Football Conference (NFC) East division.
 The team plays its home games at FedExField in Landover, Maryland; its headquarters and training facility are at Inova Sports Performance Center at Redskins Park in Ashburn, Virginia, and the Redskins Complex in Richmond, Virginia, respectively.
 The Redskins have played more than 1,000 games since 1932, and are one of only five franchises in the NFL to record over 600 regular season and postseason wins, reaching that mark in 2015.
 The Redskins have won five NFL Championships (two pre-1966 merger announcement, and three Super Bowls).
 The franchise has captured 14 NFL divisional titles and six NFL conference championships.
 The Redskins were the first team in the NFL with an official marching band, and also the first team to have a fight song, "Hail to the Redskins".