Question: What sport did George McCartney and Roy Keane both play?

Context paragraphs:
2010–11 Ipswich Town F.C. season: The 2010–11 season is Ipswich Town's ninth consecutive season in The Football League Championship, the second-highest division in the English football league system.  In addition to competing in The Championship, Ipswich Town are also competing in the League Cup and the FA Cup.  Manager Roy Keane was sacked after the defeat to Nottingham Forest in January after a season-and-a-half in charge.  First-team coach Ian McParland presided over the FA Cup defeat at Chelsea and the League Cup semi-final 1st leg win over Arsenal before Paul Jewell took over the managerial role on a permanent basis.

1998–99 FA Cup: The 1998-1999 FA Cup was won by Manchester United, who beat Newcastle United 2–0 in the final at the old Wembley Stadium.  The goals were scored by Teddy Sheringham after 11 minutes, less than two minutes after coming on as a substitute for Roy Keane, and Paul Scholes on 53 minutes.  It was the second leg of an historic Treble for Manchester United; having already won the Premier League title the previous weekend, they went on to win the UEFA Champions League the following Wednesday.

Frank Worrall: Frank Worrall is a journalist and author.  He was born in Radcliffe, Bury, and attended Hulme Grammar School, Oldham.  He later studied English Literature at Sheffield University before moving to London to work for "The Sun", "The Sunday Times" and "Mail on Sunday".  He is also the author of 14 books on sport, including the bestselling "Roy Keane: Red Man Walking", "Rooney", "Celtic United" and "Lewis Hamilton: The Biography".

Tony Loughlan: Tony Loughlan (born 19 January 1970) is an English retired professional footballer.  He is first-team coach at Burnley, having held senior coaching positions at Sunderland, Watford and Ipswich Town under Roy Keane.

George McCartney: George McCartney (born 29 April 1981) is a Northern Irish footballer.  He is a free agent having most recently played for West Ham United.  He began his career at Sunderland in 1998.  In 2005, he won club's player of the 2004–05 season award, the 2004–05 Football League Championship and was named in the 2004–05 Football League Championship PFA Team of the Year.  He moved to West Ham in 2006 before returning to Sunderland under Roy Keane's managership in 2008.  He spent one season, the 2010–11 season, on loan with Leeds United before returning in 2011 to play on loan for West Ham.  From 2001 until 2010 he also played international football for Northern Ireland.

2007–08 Sunderland A.F.C. season: The 2007–08 season was the 113th full season in Sunderland A.F.C.'s history, their 107th in the league system of English football and 7th in the Premier League.  After finishing 1st in the Championship during the 2006–07 season, Sunderland were promoted to the Premier League as champions.  Sunderland had been relegated in the 2005–06 season with the record low points tally at the time of 15.  The 2007–08 season was Roy Keane's first as a manager in the Premier League having won the Championship in his debut season.

Roy Keane: Roy Maurice Keane (born 10 August 1971) is an Irish football assistant manager and former professional football player.  He is the joint-most successful Irish footballer of all time, having won 19 major trophies, 17 of which came at Manchester United, in his club career.  He is currently the assistant manager of the Republic of Ireland national football team.

2000 FA Charity Shield: The 2000 FA Charity Shield (also known as the One 2 One FA Charity Shield for sponsorship reasons) was the 78th FA Charity Shield, an annual football match played between the winners of the previous season's Premier League and FA Cup competitions.  The match was played between Manchester United, who won the 1999–2000 Premier League, and Chelsea, who won the 1999–2000 FA Cup, and resulted in a 2–0 Chelsea win.  The goals were scored by Jimmy Floyd Hasselbaink and Mario Melchiot.  Roy Keane was sent off for a challenge on Gustavo Poyet and was the last person to be sent off at the old Wembley Stadium.

I, Keano: I, Keano is a comedy musical play about footballer Roy Keane leaving the Republic of Ireland national football team before the 2002 FIFA World Cup.

Saipan incident: The Saipan incident was a public quarrel in May 2002 between Republic of Ireland national football team's captain Roy Keane and manager Mick McCarthy when the team was preparing in Saipan for its matches in Japan in the 2002 FIFA World Cup.  It resulted in Keane, a key player, being sent home from the squad.  The incident divided public opinion in Ireland regarding who was to blame.

Supporting paragraphs: George McCartney Roy Keane
Answer: football