Question: Johan Cruyff was an exponent of the football philosophy expounded by a coach of what nationality?
Context: Estadi Johan Cruyff, (meaning in English "Johan Cruyff Stadium") is an under-construction football stadium located in Barcelona, Catalonia, Spain. The 2015 Johan Cruyff Shield was the twentieth Johan Cruyff Shield (Dutch: "Johan Cruijff Schaal"), an annual Dutch football match played between the winners of the previous season's Eredivisie and KNVB Cup.  The match was contested by FC Groningen, the 2014–15 KNVB Cup winners, and PSV, champions of the 2014–15 Eredivisie.  It was held at the Amsterdam Arena on 2 August 2015.  PSV won the match 3–0. The Johan Cruyff Institute is an educational institution, founded by Johan Cruyff, aimed at educating athletes, sport and business professionals in the field of sport management. The 2017 Johan Cruyff Shield was the twenty-second Johan Cruyff Shield (Dutch: "Johan Cruijff Schaal"), an annual Dutch football match played between the winners of the previous season's Eredivisie and KNVB Cup.  The match was contested by Feyenoord, champions of the 2016–17 Eredivisie, and Vitesse, winners of the 2016–17 KNVB Cup.  It was held at the De Kuip on 5 August 2017. The Johan Cruyff Shield (Dutch: Johan Cruijff Schaal ) is a football trophy in the Netherlands named after the Dutch football player Johan Cruyff, also often referred to as the Dutch Super Cup.  The winner is decided in one match only, played by the winner of the national football league (the Eredivisie) and the winner of the national KNVB Cup.  In the event of a team winning both the Eredivisie and the KNVB Cup, the Johan Cruyff Shield will be contested between that team and the runner up in the national league.  The match traditionally opens the Dutch football season in August one week before the Eredivisie starts. The 2014 Johan Cruyff Shield was the nineteenth Johan Cruyff Shield (Dutch: "Johan Cruijff Schaal"), an annual Dutch football match played between the winners of the previous season's Eredivisie and KNVB Cup.  The match was contested by PEC Zwolle, the 2013–14 KNVB Cup winners, and Ajax, champions of the 2013–14 Eredivisie.  It was held at the Amsterdam Arena on 3 August 2014.  PEC Zwolle won the match 1–0. The 2016 Johan Cruyff Shield was the twenty-first Johan Cruyff Shield (Dutch: "Johan Cruijff Schaal"), an annual Dutch football match played between the winners of the previous season's Eredivisie and KNVB Cup.  The match was contested by Feyenoord, the 2015–16 KNVB Cup winners, and PSV, champions of the 2015–16 Eredivisie.  It was held at the Amsterdam Arena on 31 July 2016.  Watched by a crowd of 30,000 and a television audience of 1.7 million, PSV won the match 1–0. Hendrik Johannes "Johan" Cruijff (] , anglicised to Cruyff; 25 April 1947 – 24 March 2016) was a Dutch professional football player and coach.  As a player, he won the Ballon d'Or three times, in 1971, 1973, and 1974.  Cruyff was the most famous exponent of the football philosophy known as Total Football explored by Rinus Michels, and is widely regarded as one of the greatest players in football history.  In the 1970s, Dutch football rose from near obscurity to become a powerhouse in the sport.  Cruyff led the Netherlands to the final of the 1974 FIFA World Cup and received the Golden Ball as player of the tournament.  At the 1974 finals, he executed a feint that subsequently was named after him, the "Cruyff Turn", a move widely replicated in the modern game. The 2013 Johan Cruyff Shield was the eighteenth Johan Cruyff Shield (Dutch: "Johan Cruijff Schaal"), an annual Dutch football match played between the winners of the previous season's Eredivisie and KNVB Cup.  The match was contested by AZ, the 2012–13 KNVB Cup winners, and Ajax, champions of the 2012–13 Eredivisie.  It was held at the Amsterdam Arena on 27 July 2013.  Ajax won the match 3–2 after extra time. Marinus Jacobus Hendricus "Rinus" Michels (] ; 9 February 1928 – 3 March 2005) was a Dutch association football player and coach.  He played his entire career for the club AFC Ajax, which he later coached, and was a member of the Netherlands national team both as a player and as manager.  He is regarded as one of the greatest managers of all time.
Answer: Dutch