Question: Which  equestrian weekly magazine of the United Kingdom is Mark Phillips a columnist in 

full_context: Document 1: Anne, Princess Royal: Anne, Princess Royal, {'1': ", '2': ", '3': ", '4': "} (Anne Elizabeth Alice Louise; born 15 August 1950) is the second child and only daughter of Queen Elizabeth II and Prince Philip, Duke of Edinburgh. At the time of her birth, she was third in the line of succession to the British throne, behind her mother – then Princess Elizabeth – and elder brother, Charles. She rose to second after her mother's accession, but is currently 12th in line.
Document 2: Prince Andrew, Duke of York: Prince Andrew, Duke of York, {'1': ", '2': ", '3': ", '4': "} (Andrew Albert Christian Edward, born 19 February 1960), is the second son and third child of Queen Elizabeth II and Prince Philip, Duke of Edinburgh. At the time of his birth, he was second in the line of succession to the British throne; as of 2017 he is sixth in line.
Document 3: Mark Hedges: Jonathan Mark Hedges (born 24 February 1964) is a British journalist, and the Editor of "Country Life", published by Time Inc. UK.
Document 4: The Lady (magazine): The Lady is Britain's longest-running weekly women's magazine. It has been in continuous publication since 1885 and is based in London. It is particularly notable for its classified advertisements for domestic service and child care; it also has extensive listings of holiday properties.
Document 5: Zara Tindall: Zara Anne Elizabeth Tindall {'1': ", '2': ", '3': ", '4': "} (née Phillips; born 15 May 1981) is a British equestrian and the second child and only daughter of Anne, Princess Royal, and her first husband, Captain Mark Phillips. She is the second-eldest grandchild of Queen Elizabeth II and Prince Philip, Duke of Edinburgh. Tindall is married to former England rugby union player Mike Tindall.
Document 6: List of ISH Showjumpers: The Irish Sport Horse (ISH) (US: Irish Draught Sports Horse), also known as the Irish Hunter, is mainly the result of a cross between the Irish Draught and the Thoroughbred. It has been given recognition as a separate breed. It is commonly bred from parents who are also Irish Sport Horses, in addition to being bred from the definitive parent breeds. The Irish Sport Horse is traditionally used for all purposes, from transportation, to riding, and working the land. However, it is becoming increasingly popular as a competition riding horse. Its athletic ability and jumping talents means that it does well in the show jumping arena, as well as competing at the highest levels of eventing. The horse is renowned for being one of the best fox hunting mounts in the world, and the Irish Sport Horse studbook regularly tops the rankings for eventing. Ireland produces a largr number of Irish Sport Horses each year, many of them selling for large amounts in the United States and Europe.
Document 7: William Fox-Pitt: William Fox-Pitt (born 2 January 1969) is an English equestrian who competes in eventing. His career highlights include winning three Olympic medals in the team event, with silver in 2004 and 2012, and bronze in 2008. At the World Equestrian Games, he won team gold and individual silver in 2010, and team silver and individual bronze in 2014. He also won World team medals in 2002 and 2006. At the European Championships, he has won six team gold medals, as well as Individual silver in 1997 and 2005, and Individual bronze in 2013. In 2011, he became the first rider to win five different four-star events, having won the Burghley Horse Trials a record six times (1994, 2002, 2005, 2007, 2008 and 2011), Rolex Kentucky three times (2010, 2012, 2014), Stars of Pau twice (2011, 2013), the Badminton Horse Trials twice (2004, 2015), and the Luhmühlen Horse Trials once (2008). A serious fall in 2015 left him in a coma for two weeks, but he came back to make the British eventing team and attend the 2016 Summer Olympics.
Document 8: British Horseracing Board: From 10 June 1993 until 30 July 2007, the British Horseracing Board (BHB) was the governing authority for horseracing in Great Britain. It was created in 1993, and took on responsibilities previously held by the Jockey Club. This was intended to help modernise the sport, as the Jockey Club is a private members' club with a traditionally aristocratic membership, and was seen by some as being unaccountable and a relic of the tradition of amateurism in British sports administration. The Jockey Club however retained responsibility for matters concerned with the regulation of the sport, such as integrity, discipline and equine health. The British Horseracing Board focused on organising and promoting the sport and enhancing its commercial position. This was an extract from its statement of aims published in 2006:
Document 9: Autocar (magazine): Autocar is a weekly British automobile magazine published by Haymarket Motoring Publications Ltd. It was first published in 1895 and refers to itself as "The World's oldest car magazine". There are now several international editions including China, India, New Zealand and South Africa.
Document 10: Mark Phillips: Captain Mark Anthony Peter Phillips {'1': ", '2': ", '3': ", '4': "} (born 22 September 1948) is an English Olympic gold-medal-winning horseman for Great Britain and former husband of Anne, Princess Royal, with whom he has two children. He remains a leading figure in British equestrian circles, a noted eventing course designer, and a columnist in "Horse & Hound" magazine.
Document 11: Four Wheeler: Four Wheeler was the first, and is the oldest, magazine for the 4x4 and off-road truck and SUV enthusiast. The first issue was published in February 1962, and in 2012, the internationally read magazine celebrated its 50th anniversary. Four Wheeler focuses on new-vehicle evaluations, project vehicles, the technical aspects of building a vehicle (such as how to install aftermarket accessories and do complete engine swaps), product tests, outdoor equipment and machines, 4x4 shows and competitions, and travel and adventure.
Document 12: Tony McCoy: Sir Anthony Peter McCoy, OBE (born 4 May 1974), commonly known as A. P. McCoy or Tony McCoy, is a Northern Irish former horse racing jockey. Based in Ireland and the UK, McCoy rode a record 4,358 winners, and was Champion Jockey a record 20 consecutive times, every year he was a professional. He stands 1.78 m (5'10"), far taller than most jockeys.
Document 13: Horse &amp; Hound: Horse & Hound is the oldest equestrian weekly magazine of the United Kingdom. Its first edition was published in 1884. The magazine contains horse industry news, reports from equestrian events, veterinary advice about caring for horses, and horses for sale. Fox hunting has always been an important topic for the magazine, as are the sports of eventing, dressage, show jumping, horse racing, showing, carriage driving and endurance riding. The magazine includes commentaries from top riders and trainers including event rider William Fox-Pitt, top eventing trainer Captain Mark Phillips, top show jumper William Funnell and Olympic dressage rider and trainer Carl Hester, among others. Its current Content Director is Sarah Jenkins, who replaced the magazine's first female editor, Lucy Higginson, in July 2014.
Document 14: Mark Phillips (disambiguation): Mark Phillips is a British equestrian, the former husband of Anne, Princess Royal.
Document 15: Wedding of Princess Anne and Mark Phillips: The wedding of Princess Anne and Mark Phillips took place on Wednesday, 14 November 1973 at Westminster Abbey in London. Anne, Princess Royal is the only daughter and second child of Elizabeth II and Prince Philip, Duke of Edinburgh, while Mark Phillips is a skilled horseman and equestrian.
ground_truth: Horse & Hound