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Dutch queen Maxima is pictured during her visit to the IMC Weekendschool on Tour in Haarlem, on February 1, 2017. / AFP / ANP / Olaf KRAAK / Netherlands OUT (Photo credit should read OLAF KRAAK/AFP/Getty Images)

Dutch queen Maxima is pictured during her visit to the IMC Weekendschool on Tour in Haarlem, on February 1, 2017.  / AFP / ANP / Olaf KRAAK / Netherlands OUT        (Photo credit should read OLAF KRAAK/AFP/Getty Images)

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Dutch queen Maxima is pictured during her visit to the IMC Weekendschool on Tour in Haarlem, on February 1, 2017. / AFP / ANP / Olaf KRAAK / Netherlands OUT (Photo credit should read OLAF KRAAK/AFP/Getty Images)

Dutch queen Maxima is pictured during her visit to the IMC Weekendschool on Tour in Haarlem, on February 1, 2017.  / AFP / ANP / Olaf KRAAK / Netherlands OUT        (Photo credit should read OLAF KRAAK/AFP/Getty Images)

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Dutch queen Maxima is pictured during her visit to the IMC Weekendschool on Tour in Haarlem, on February 1, 2017. / AFP / ANP / Olaf KRAAK / Netherlands OUT (Photo credit should read OLAF KRAAK/AFP/Getty Images)

Dutch queen Maxima is pictured during her visit to the IMC Weekendschool on Tour in Haarlem, on February 1, 2017.  / AFP / ANP / Olaf KRAAK / Netherlands OUT        (Photo credit should read OLAF KRAAK/AFP/Getty Images)

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NIJMEGEN, THE NETHERLANDS - JANUARY 31 : Queen Maxima visits the Windmill park Nijmegen-Betuwe in Nijmegen on January 31, 2017 in Nijmegen, The Netherlands. The park is an initiative owned by private citizens through the local cooperative, Windpower Nijmegen. (Photo by Patrick van Katwijk/Getty Images)

NIJMEGEN, THE NETHERLANDS - JANUARY 31 : Queen Maxima visits the Windmill park Nijmegen-Betuwe in Nijmegen on January 31, 2017 in Nijmegen, The Netherlands. The park is an initiative owned by private citizens through the local cooperative, Windpower Nijmegen. (Photo by Patrick van Katwijk/Getty Images)

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NIJMEGEN, THE NETHERLANDS - JANUARY 31 : Queen Maxima visits the Windmill park Nijmegen-Betuwe in Nijmegen on January 31, 2017 in Nijmegen, The Netherlands. The park is an initiative owned by private citizens through the local cooperative, Windpower Nijmegen. (Photo by Patrick van Katwijk/Getty Images)

NIJMEGEN, THE NETHERLANDS - JANUARY 31 : Queen Maxima visits the Windmill park Nijmegen-Betuwe in Nijmegen on January 31, 2017 in Nijmegen, The Netherlands. The park is an initiative owned by private citizens through the local cooperative, Windpower Nijmegen. (Photo by Patrick van Katwijk/Getty Images)