Question: How many professional footballers participate in a musical project that includes a player who began his career with Norwegian club Tromsø?

Context articles: Tromsø IL
Bjarte Flem
Morten Gamst Pedersen
The Players (Norwegian band)
PFA Women's Young Player of the Year
Mickey Bennett
PFA Women's Players' Player of the Year
PFA Players' Player of the Year
PFA Scotland Players' Player of the Year
PFA Young Player of the Year

Tromsø Idrettslag is a Norwegian professional football club founded in 1920, based in the city of Tromsø.
 They play their home games at Alfheim Stadion.
 Tromsø currently play in the Tippeligaen and holds the position as the northernmost top-level football club in the world.
 The club was first promoted to the Norwegian Premier League in 1985, where they have played since with the exception of the 2001 and 2014 seasons which were spent in the First Division.
Bjarte Flem (born March 30, 1958) is a former Norwegian football goalkeeper.
 He played for the Norwegian football club Tromsø.
Morten Gamst Pedersen (born 8 September 1981) is a Norwegian professional footballer who plays as a winger for Norwegian club Tromsø, the club with which he began his career.
The Players is a Norwegian musical project consisting of five professional footballers: Freddy dos Santos, Morten Gamst Pedersen, Raymond Kvisvik, Kristofer Hæstad and Øyvind Svenning.
The Professional Footballers' Association Women's Young Player of the Year (commonly referred to as PFA Young Player of the Year) is an annual award given to the player who is voted to have been the best of the year in English women's football.
 The award has been presented since the 2013–14 season and the winner is chosen by a vote amongst the members of the players' trade union, the Professional Footballers' Association (PFA).
Michael Richard Bennett (born 27 August 1969) is an English former professional footballer who played as a winger.
 During his career, he made over 150 appearances in the Football League.
 Since his retirement from playing, Bennett has become involved with helping footballers dealing with depression and is currently the head of player welfare at the Professional Footballers' Association.
The Professional Footballers' Association Women's Players' Player of the Year is an annual award given to the player who is voted to have been the best of the year in English women's football.
 The award has been presented since the 2012–13 season and the winner is chosen by a vote amongst the members of the players' trade union, the Professional Footballers' Association (PFA).
 The current holder is Lucy Bronze, who won the award on 23 April 2017.
 The first winner of the award was Arsenal midfielder Kim Little in 2013.
The Professional Footballers' Association Players' Player of the Year (often called the PFA Players' Player of the Year, the Players' Player of the Year, or simply the Player of the Year) is an annual award given to the player who is adjudged to have been the best of the year in English football.
 The award has been presented since the 1973–74 season and the winner is chosen by a vote amongst the members of the players' trade union, the Professional Footballers' Association (PFA).
 The current holder is N'Golo Kanté, who won the award on 23 April 2017 for his displays throughout the 2016–17 season, representing Chelsea.
The Professional Footballers' Association Scotland Players' Player of the Year (often called the PFA Scotland Players' Player of the Year, the Players' Player of the Year, or simply the Scottish Player of the Year) is an annual award given to the player who is adjudged to have been the best of the season in Scottish football.
 The award has been presented since the 1977–78 season and the winner is chosen by a vote amongst the members of the players' trade union, the Professional Footballers' Association Scotland (PFA Scotland).
 The award was formerly known as the Scottish Professional Footballers' Association Players' Player of the Year, but was renamed after the SPFA merged with the (English) Professional Footballers' Association to become PFA Scotland.
The Professional Footballers' Association Young Player of the Year (often called the PFA Young Player of the Year, or simply the Young Player of the Year) is an annual award given to the player aged 23 or under at the start of the season who is adjudged to have been the best of the season in English football.
 The award has been presented since the 1973–74 season and the winner is chosen by a vote amongst the members of the players' trade union, the Professional Footballers' Association (PFA).
 The first winner of the award was Ipswich Town defender Kevin Beattie.
 The current holder is Dele Alli, who won the award for his performances throughout the 2016–17 campaign for Tottenham Hotspur.