Question: The 2011 Speedwat Grand Prix of Great Britain took place in a stadium that is home to what team? 

Context paragraphs:
2007 Speedway Grand Prix of Great Britain: The 2007 Speedway Grand Prix of Great Britain, known as the 2007 FIM Meridian Lifts British Speedway Grand Prix for sponsorship reasons, was the fifth race of the 2007 Speedway Grand Prix season.  It took place on 30 June in the Millennium Stadium in Cardiff, United Kingdom.

2013 Speedway Grand Prix of Great Britain: The 2013 Speedway Grand Prix of Great Britain, also known as the 2013 FIM Fogo British Speedway Grand Prix for sponsorship reasons, was the fifth race of the 2013 Speedway Grand Prix season.  It took place on 1 June at the Millennium Stadium in Cardiff, Wales, United Kingdom.  The Grand Prix was won by Emil Sayfutdinov who beat Niels Kristian Iversen, Krzysztof Kasprzak and Fredrik Lindgren in the final.

2008 Speedway Grand Prix of Great Britain: The 2008 Speedway Grand Prix of Great Britain, known as the 2008 FIM Meridian Lifts British Speedway Grand Prix for sponsorship reasons, was the fifth race of the 2008 Speedway Grand Prix season.  It took place on 28 June, in the Millennium Stadium in Cardiff, Wales, United Kingdom.  The British Grand Prix is one of the four Super Prix events held in 2008.  The winner in Cardiff will progress to the Super Prix final, taking gate 3 and the white helmet colour.

2014 Speedway Grand Prix of Great Britain: The 2014 Speedway Grand Prix of Great Britain, also known as the 2014 FIM MITAS British Speedway Grand Prix for sponsorship reasons, was the seventh race of the 2014 Speedway Grand Prix season.  It took place on 7 July at the Millennium Stadium in Cardiff, Wales, United Kingdom.  The Grand Prix was won by Greg Hancock who beat Tai Woffinden, Darcy Ward and Krzysztof Kasprzak in the final.

2009 Speedway Grand Prix of Great Britain: The 2009 FIM Speedway World Championship Grand Prix of Great Britain was the fifth race of the 2009 Speedway Grand Prix season.  It took place on 27 June 2009 in the Millennium Stadium in Cardiff, Great Britain.

Millennium Stadium: The Millennium Stadium (Welsh: "Stadiwm y Mileniwm" ), currently known for sponsorship purposes as the Principality Stadium (Welsh: "Stadiwm Principality" ), is the national stadium of Wales, located in Cardiff.  It is the home of the Wales national rugby union team and has also staged games of the Wales national football team.  Initially built to host the 1999 Rugby World Cup, it has gone on to host many other large-scale events, such as the Tsunami Relief concert, the Super Special Stage of Wales Rally Great Britain, the Speedway Grand Prix of Great Britain and various music concerts.  It also hosted six FA Cup finals and several other high-profile football fixtures while Wembley Stadium was being redeveloped.

2011 Speedway Grand Prix of Great Britain: The 2011 Speedway Grand Prix of Great Britain, also known as the 2011 FIM Doodson British Speedway Grand Prix for sponsorship reasons, was the fifth race of the 2011 Speedway Grand Prix season.  It took place on 25 June at the Millennium Stadium in Cardiff, Great Britain.

2012 Speedway Grand Prix of Great Britain: The 2012 Speedway Grand Prix of Great Britain, also known as the 2012 FIM Fogo British Speedway Grand Prix for sponsorship reasons, was the ninth race of the 2012 Speedway Grand Prix season.  It took place on 25 August at the Millennium Stadium in Cardiff, Wales, United Kingdom.

2009 Australian motorcycle Grand Prix: The 2009 Australian motorcycle Grand Prix was the fifteenth round of the 2009 Grand Prix motorcycle racing season.  It took place on the weekend of 16–18 October 2009 at the Phillip Island Grand Prix Circuit.  Ducati rider Casey Stoner won the grand prix, in his home race.  Championship leader Valentino Rossi finished second, further increasing his championship lead over rival Jorge Lorenzo, who crashed out and failed to score any points.  This also marked the final Grand Prix win in the career of Marco Simoncelli before his death 2 years later on 23rd October 2011 at the 2011 Malaysian motorcycle Grand Prix after suffering a fatal crash in Race.

1996 Speedway Grand Prix of Great Britain: The 1996 Speedway Grand Prix of Great Britain was the fifth race of the 1996 Speedway Grand Prix season.  It took place on 31 August in the London Stadium in London, Great Britain It was the second Swedish SGP and was won by Australian rider Jason Crump, being the first win of his career.

Supporting paragraphs: 2011 Speedway Grand Prix of Great Britain Millennium Stadium
Answer: Wales national rugby union team