In gridiron football, a lineman is a player who specializes in play at the line of scrimmage.
 The linemen of the team currently in possession of the ball are the offensive line, while linemen on the opposing team are the defensive line.
 A number of NFL rules specifically address restrictions and requirements for the offensive line.
 The defensive line is covered by the same rules that apply to all defensive players and the offensive lineman are supposed to help block the quarterback from getting sacks for a loss or even worse a fumble.
 Linemen are usually the largest players on the field in both height and weight, since their positions usually require less running and more strength than skill positions.
Kenneth Ray Callahan (April 28, 1933 – September 2, 2017) was an American football player and coach.
 He was recruited by Coach Paul Bear Bryant at the University of Kentucky in 1952 under a full scholarship.
 Coach Bryant mentored him often taking him fishing and along on other recruiting trips to convince players to come to U.K. to play.
 He later coached for his alma mater as an assistant coach from 1963 to 1966.
 He then moved to University of Cincinnati as an assistant coach for 2 years before becoming the head football coach from 1969 to 1972, compiling a record of 20–23.
 His first pro team was in 1973 with the Baltimore Colts as a linebacker coach under former teammate Howard Schnellenberger.
 Callahan then took a chance with the World Football League Florida Blazers with Jack Pardee.
 The Blazers made it to the World Bowl losing to the Birmingham Americans by 1 point but with controversy in the officiating.
 Coach Callahan then bolted back to the NFL with the Chicago Bears as the offensive line coach in front of Walter Peyton for his first 3 years as a player.
 The Washington Redskins was his next stop for 3 years of offensive line coach again with Jack Pardee at the helm.
 Callahan then headed south to Texas with the Houston Oilers as the defensive line coach for 2 years.
 Joe Walton then called upon Ray Callahan to lead up the defensive line "sack exchange" consisting of Barry Bennett, Marty Lyons, Joe Klecko, Mark Gastineau, of the New York Jets for the next 7 years.
 Callahan retired to Bracey, Va on Lake Gaston and enjoyed lake life with his high school sweetheart wife Essie "Lee" Dorsey.
 Callahan died on September 2, 2017.
Mike Waufle (born June 27, 1954) is an American football coach who is currently the defensive line coach for the Buffalo Bills of the National Football League (NFL).
 Waufle has also served as defensive line coach for the Oakland Raiders from 1998 to 2003, and again from 2010 to 2011.
 He has coached at the college and professional level, and also as both offensive and defensive assistant throughout his career.
 Waufle was also a member of the 2007 New York Giants, who won Super Bowl XLII.
 He was the Giants' defensive line coach from 2004 to 2009 before joining the Raiders in 2010.
 From 2012-2016, he was the defensive line coach for the St. Louis/Los Angeles Rams under defensive coordinator Gregg Williams.
 In 2017, the Buffalo Bills announced that Waufle would be their new Defensive Line coach.
Patrick Graham (born January 24, 1979) is an American football coach who is the defensive line coach for the New York Giants of the National Football League (NFL).
 Graham played college football as a defensive lineman at Yale University, graduating with a bachelor's degree in sociology in 2002.
 After his college football career, he worked as a graduate assistant at Wagner College while also studying for an MBA.
 After two seasons at Wagner, Graham moved to the University of Richmond, where he was a defensive line coach in 2004 and then a tight ends coach in 2005 and 2006.
 In 2007, he was a defensive graduate assistant under head coach Charlie Weis at the University of Notre Dame.
 Following the 2008 season, Graham accepted a position as defensive line coach at the University of Toledo.
 However, he left the school in February 2009 to join the New England Patriots as a defensive coaching assistant, where Weis had formerly been an assistant coach under Patriots head coach Bill Belichick.
 In 2010, Graham's title was changed to defensive assistant coach.
 He was promoted to linebackers coach in 2011.
 In 2012, he moved to defensive line coach, and moved back to linebackers in 2014.
 In 2016, he was hired by the New York Giants as defensive line coach.
Ball possession is the amount of time a team possesses the ball during a game of football.
 Possession is usually expressed as a percentage (for example, 60% for team A, 40% for team B).
 Historically, Dutch clubs (especially Ajax) were famous for dominating ball possession, but more recently Barcelona of La Liga became the best in maintaining ball possession; Germany's Bayern Munich came out second.
 However, after the arrival of Pep Guardiola at Bayern Munich, the team is considered to dominate possession more than Barcelona, which they did during the semi-final of the 2014–15 UEFA Champions League.
 Xavi is considered to be the most possessive player in recent years.
 Paul Scholes of Manchester United and England, was also very famous for his passing skills and the ability to dominate ball possession.
 Teams that play possession football often try to press their opponents high in the pitch, so to recover the ball rapidly.
 As a result, the defensive line of team that play possession football is usually place very high in the pitch, around the halfway line and not unusually, in the opponents half.
 When the team loses the ball the defensive line must move rapidly otherwise the team may be subject to dangerous counter-attacks because of their high defensive line.
Lee Michael Dixon (born 17 March 1964) is an English retired professional footballer who played as a right-back for Arsenal, Burnley, Bury, Chester City and Stoke City as well as the England national team.
Jim Washburn (born December 2, 1949) is an American football coach.
 He was the assistant defensive line coach for the Detroit Lions from 2013 to 2015, defensive line coach for the Philadelphia Eagles of the National Football League and the Tennessee Titans' defensive line coach from 1999 to 2010.
Nigel Winterburn (born 11 December 1963) is an English former professional footballer and current pundit for BT Sport, who played as a left back from 1981 to 2003.
 He is best known for his role alongside the likes of Tony Adams, Steve Bould, Martin Keown and Lee Dixon, forming a celebrated defensive line for Arsenal in the Premier League and European football during the 1990s.
Jackie Vernold Shipp (born March 19, 1962) is a former American football linebacker who played in the National Football League.
 Shipp also was the defensive line coach for the Oklahoma Sooners football team until his departure in the 2013 off season.
 He had been on the Sooners' coaching staff since the arrival of Bob Stoops in 1999.
 He was the defensive line coach at Arizona State from 2013-2015, and was the defensive line coach at the University of Missouri for part of the 2016 season.
Michael Glenn Sinclair (born January 31, 1968 in Galveston, Texas) is a former American football defensive end and defensive line coach.
 He played eleven seasons in the National Football League with the Seattle Seahawks and the Philadelphia Eagles.
 Sinclair was a three-time Pro Bowler in 1996, 1997 and 1998.
 He led the NFL in sacks in 1998 with 16.5.
 He won the World Bowl as defensive line coach for the Hamburg Sea Devils in NFL Europa in 2007.
 He was named the defensive line coach for the Montreal Alouettes in January 2008, where he spent five seasons and won two Grey Cup championships.
 On January 18, 2013, Sinclair followed Alouettes head coach Marc Trestman to the Chicago Bears.
 Sinclair was fired on January 25, 2014.

Question: Which national team did the Arsenal's defensive line teammate of Nigel Winterburn play for?
Answer: England national team