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IJSSELSTEIN, NETHERLANDS - MARCH 11: Princess Beatrix of The Netherlands volunteers for NL Doet in the the kindergarden on March 11, 207 in IJsstelsteijn, The Netherlands. NL Doet is a National Volunteer day organized by the Oranje Fonds. (Photo by Patrick Van Katwijk/Getty Images)

IJSSELSTEIN, NETHERLANDS - MARCH 11: Princess Beatrix of The Netherlands volunteers for NL Doet in the the kindergarden on March 11, 207 in IJsstelsteijn, The Netherlands. NL Doet is a National Volunteer day organized by the Oranje Fonds. (Photo by Patrick Van Katwijk/Getty Images)

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IJSSELSTEIN, NETHERLANDS - MARCH 11: Princess Beatrix of The Netherlands volunteers for NL Doet in the the kindergarden on March 11, 207 in IJsstelsteijn, The Netherlands. NL Doet is a National Volunteer day organized by the Oranje Fonds. (Photo by Patrick Van Katwijk/Getty Images)

IJSSELSTEIN, NETHERLANDS - MARCH 11: Princess Beatrix of The Netherlands volunteers for NL Doet in the the kindergarden on March 11, 207 in IJsstelsteijn, The Netherlands. NL Doet is a National Volunteer day organized by the Oranje Fonds. (Photo by Patrick Van Katwijk/Getty Images)

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IJSSELSTEIN, NETHERLANDS - MARCH 11: Princess Beatrix of The Netherlands laughs as she volunteers for NL Doet in the the kindergarden on March 11, 207 in IJsstelsteijn, The Netherlands. NL Doet is a National Volunteer day organized by the Oranje Fonds. (Photo by Patrick Van Katwijk/Getty Images)

IJSSELSTEIN, NETHERLANDS - MARCH 11: Princess Beatrix of The Netherlands laughs as she volunteers for NL Doet in the the kindergarden on March 11, 207 in IJsstelsteijn, The Netherlands. NL Doet is a National Volunteer day organized by the Oranje Fonds. (Photo by Patrick Van Katwijk/Getty Images)