Question: What clan lived in the castle where Flora Harris competed at the Young Rider European Eventing Championships in 2007?

Context paragraphs:
European Eventing Championships: The European Eventing Championships, like most other European Championships, is held every two years.  Today it is a three star eventing competition.  A three star event is one step down from the grand slam which consists of three four star events.

Mary King (equestrian): Mary Elizabeth King MBE (née Thomson, born 8 June 1961) is a British equestrian who competes in eventing.  She has represented Great Britain at six Olympics from 1992 to 2012, winning team silver in 2004 and 2012, and team bronze in 2008.  At the World Equestrian Games, she won team gold in 1994 and 2010, and team silver in 2006.  She has also won four team golds and one team bronze medal at the European Eventing Championships.

Harry Meade: Harry Meade (born 4 July 1983) is a British eventing rider.  Representing Great Britain, he competed at the 2014 World Equestrian Games in Normandy, France, where he won a team silver medal.  In 2004 he was shortlisted for the Young Rider European Championships with the horse Midnight Dazzler.

Joost Posthuma: Joost Posthuma (born 8 March 1981) is a Dutch retired professional road bicycle racer, who competed as a professional between 2004 and 2012.  Born in Hengelo, Posthuma was known for his time-trialling and he wore the white jersey for the best young rider at the 2006 Tour de France.  Posthuma set the best time for riders eligible for the young rider classification in the prologue, but lost it after the 1st road stage, after a rival got in a breakaway and got bonus seconds on the road.

Flora Harris: Flora Harris (born 21 March 1988 in London, later moving to live near Taunton, before setting up her own yard near Banbury in Oxfordshire, Flora is now based in Bramley, Hampshire.  is an eventrider who became a full senior in 2010.  In 2007, she competed for Great Britain at the Young Rider European Eventing Championships at Blair Castle, Scotland.

White jersey: Numerous cycling stage races award a white jersey to signify the current leader and overall winner of a certain competition, or to signify the best young rider in the race.  The most prominent of these is the Tour de France, where the jersey is known as the "maillot blanc" and is awarded to the best-placed rider age under 26.  The use of the white jersey to recognize the best young rider in a race is its most common use, though some tours award a white jersey for a different classification.

Clare Abbott (equestrian): Clare Abbott (born 28 July 1986) is an Irish eventing rider.  Representing Ireland, she competed at the 2014 World Equestrian Games and at the 2013 European Eventing Championships.

Blair Castle: Blair Castle stands in its grounds near the village of Blair Atholl in Perthshire in Scotland.  It is the ancestral home of the Clan Murray, and was historically the seat of their chief, the Duke of Atholl, though the current (12th) Duke, Bruce Murray, lives in South Africa.  The castle stands in Glen Garry, and commands a strategic position on the main route (now the A9 road) through the central Scottish Highlands.

List of ISH Eventers: This is a list of Irish Sport Horses (ISH) that have won medals or been placed at the highest levels of eventing.  Including the Olympic Games, Eventing World Championship (WEG), European Eventing Championships, Eventing World Cup and the Pan-American Games.

Young rider classification in the Tour de France: The young rider classification is a secondary competition in the Tour de France, that started in 1975.  Excluding the years 1989 to 1999, the leader of the young rider classification wears a white jersey (French: "maillot blanc" ).  The requirements to be eligible for the young rider classification have changed over the years but have always been such that experienced cyclists were not eligible, sometimes by excluding cyclists over a certain age, cyclists who had entered the Tour de France before, or cyclists who had been professional for more than two years.  In the most recent years, only cyclists below 26 years are eligible.

Supporting paragraphs: Flora Harris Blair Castle
Answer: Clan Murray