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Prince Pieter-Christiaan (R) and Princess Anita poses as they walk through in Dordrecht, on April 27, 2015, during King's Day (Koningsdag), the celebration of the birthday of the king. The Dutch King and Queen will visit the city for the national holiday. AFP PHOTO / ANP / ARIE KIEVIT ***NETHERLANDS OUT*** (Photo credit should read ARIE KIEVIT/AFP/Getty Images)