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.
The 1966 NFL season was the 47th regular season of the National Football League, and the season after which was played Super Bowl I, though it was called the AFL-NFL World Championship Game.
 The league expanded to 15 teams with the addition of the Atlanta Falcons, thus an odd number of teams (making byes necessary).
 This was the last season that NFL teams were divided into just two groups called conferences, and only one round of playoffs was played, the NFL championship game between the two conference champions.
 The season concluded with Super Bowl I.
 The NFL Green Bay Packers defeated the AFL Kansas City Chiefs at the  Los Angeles Memorial Coliseum with a score of 35-10.
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.
The 1990 NFL season was the 71st regular season of the National Football League.
 To increase revenue, the league changed the regular season so that all NFL teams would play their 16-game schedule over a 17-week period.
 Furthermore, the playoff format was expanded from 10 teams to 12 teams by adding another wild card from each conference, thus adding two more contests to the postseason schedule; this number remains in use now.
 During four out of the five previous seasons, at least one team with a 10–6 record missed the playoffs, including the 11–5 Denver Broncos in 1985; meanwhile, the 10–6 San Francisco 49ers won Super Bowl XXIII, leading for calls to expand the playoff format to ensure that 10–6 teams could compete for a Super Bowl win.
 Ironically, the first ever sixth-seeded playoff team would not have a 10–6 record, but instead, the New Orleans Saints, with a paltry 8–8 record, took the new playoff spot.
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.
Anthony Drew Dorsett, Jr. (born September 14, 1973) is a former American football safety.
 He was drafted by the Houston Oilers in the sixth round of the 1996 NFL Draft.
 He has also been a member of the Oakland Raiders, Toronto Argonauts and Omaha Nighthawks.
 He played college football at Pittsburgh.
 He is the son of Pro Football Hall of Fame running back Tony Dorsett.
The American Football Conference (AFC) is one of two conferences within the National Football League, the National Football Conference (NFC) being the other.
 The AFC has its roots in the American Football League (AFL), which began to play in 1960.
 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.
The American Football Conference North Division, or AFC North, is a division of the National Football League's (NFL) American Football Conference (AFC).
 It was created as the AFC Central in 1970 following the completion of the AFL–NFL merger when two of the NFL teams—the Cleveland Browns and the Pittsburgh Steelers—moved from the "old" NFL to join the former American Football League teams in the AFC, in order to give the two conferences an equal number of teams.
 The division adopted its current name in 2002, when the league realigned divisions after expanding to 32 teams.
In the National Football League (NFL), a tied game occurs when a regular season game ends with both teams having an equal score.
 Ties have counted as a half-win and half-loss in league standings since 1972; before that, ties were not counted in the standings at all.
 Since the National Hockey League eliminated ties by adopting the shootout following the 2004–05 NHL lockout, the NFL is the only one of the four major professional sports leagues in North America to have tied games in regular-season play, as Major League Baseball (in the modern era since 1900) and the National Basketball Association have historically played until there is a winner.
 Unlike soccer (association football), in which teams routinely play for a draw (for the benefit of a point in the standings), NFL teams rarely play for ties.
 In general, tied games in the NFL are frowned upon by both teams and fans.
 Because tied games are rare, some players have not known they were allowed in the NFL, such as former Philadelphia Eagles quarterback Donovan McNabb, who said after a tie game against the Cincinnati Bengals that he did not know a tie was a possible result.
Anthony Drew Dorsett (born April 7, 1954) is a former American football running back who played professionally in the National Football League (NFL) for the Dallas Cowboys and Denver Broncos.

Question: Which NFL teams did the father of Anthony Dorsett play for ?
Answer: Dallas Cowboys and Denver Broncos