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Princess Anne of England delivers her speech after receiving the award "Prix de l'?Ecole d?'Equitation Espagnole de Vienne" at Spanish Riding School in Vienna, Austria, on June 23, 2017. / AFP PHOTO / APA / HERBERT NEUBAUER / Austria OUT (Photo credit should read HERBERT NEUBAUER/AFP/Getty Images)

Princess Anne of England delivers her speech after receiving the award "Prix de l'?Ecole d?'Equitation Espagnole de Vienne" at Spanish Riding School in Vienna, Austria, on June 23, 2017.  / AFP PHOTO / APA / HERBERT NEUBAUER / Austria OUT        (Photo credit should read HERBERT NEUBAUER/AFP/Getty Images)

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Princess Anne of England (C) poses with horse riders after receiving the award "Prix de l'?Ecole d?'Equitation Espagnole de Vienne" at Spanish Riding School in Vienna, Austria, on June 23, 2017. / AFP PHOTO / APA / HERBERT NEUBAUER / Austria OUT (Photo credit should read HERBERT NEUBAUER/AFP/Getty Images)

Princess Anne of England (C) poses with horse riders after receiving the award "Prix de l'?Ecole d?'Equitation Espagnole de Vienne" at Spanish Riding School in Vienna, Austria, on June 23, 2017.  / AFP PHOTO / APA / HERBERT NEUBAUER / Austria OUT        (Photo credit should read HERBERT NEUBAUER/AFP/Getty Images)

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Princess Anne of England (L) receives from Austrian Agricultural Minister Andrae Rupprechter (R) the award "Prix de l'?Ecole d?'Equitation Espagnole de Vienne" at Spanish Riding School in Vienna, Austria, on June 23, 2017. / AFP PHOTO / APA / HERBERT NEUBAUER / Austria OUT (Photo credit should read HERBERT NEUBAUER/AFP/Getty Images)

Princess Anne of England (L) receives from Austrian Agricultural Minister Andrae Rupprechter (R) the award "Prix de l'?Ecole d?'Equitation Espagnole de Vienne" at Spanish Riding School in Vienna, Austria, on June 23, 2017.  / AFP PHOTO / APA / HERBERT NEUBAUER / Austria OUT        (Photo credit should read HERBERT NEUBAUER/AFP/Getty Images)

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Princess Anne of England (L) receives from Austrian Agricultural Minister Andrae Rupprechter (R) the award "Prix de l'?Ecole d?'Equitation Espagnole de Vienne" at Spanish Riding School in Vienna, Austria, on June 23, 2017. / AFP PHOTO / APA / HERBERT NEUBAUER / Austria OUT (Photo credit should read HERBERT NEUBAUER/AFP/Getty Images)

Princess Anne of England (L) receives from Austrian Agricultural Minister Andrae Rupprechter (R) the award "Prix de l'?Ecole d?'Equitation Espagnole de Vienne" at Spanish Riding School in Vienna, Austria, on June 23, 2017.  / AFP PHOTO / APA / HERBERT NEUBAUER / Austria OUT        (Photo credit should read HERBERT NEUBAUER/AFP/Getty Images)