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AMSTERDAM, NETHERLANDS - JUNE 15: Princess Beatrix of The Netherlands arrives at the Royal Palace for the annual palace symposium on June 15, 2017 in Amsterdam, Netherlands. Theme of the symposium is depopulation of the rural area. (Photo by Patrick van Katwijk/Getty Images)

AMSTERDAM, NETHERLANDS - JUNE 15: Princess Beatrix of The Netherlands arrives at the Royal Palace for the annual palace symposium on June 15, 2017 in Amsterdam, Netherlands. Theme of the symposium is depopulation of the rural area. (Photo by Patrick van Katwijk/Getty Images)

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AMSTERDAM, NETHERLANDS - JUNE 15: Princess Beatrix of The Netherlands arrives at the Royal Palace for the annual palace symposium on June 15, 2017 in Amsterdam, Netherlands. Theme of the symposium is depopulation of the rural area. (Photo by Patrick van Katwijk/Getty Images)

AMSTERDAM, NETHERLANDS - JUNE 15: Princess Beatrix of The Netherlands arrives at the Royal Palace for the annual palace symposium on June 15, 2017 in Amsterdam, Netherlands. Theme of the symposium is depopulation of the rural area. (Photo by Patrick van Katwijk/Getty Images)

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AMSTERDAM, NETHERLANDS - JUNE 15: Princess Beatrix of The Netherlands arrives at the Royal Palace for the annual palace symposium on June 15, 2017 in Amsterdam, Netherlands. Theme of the symposium is depopulation of the rural area. (Photo by Patrick van Katwijk/Getty Images)

AMSTERDAM, NETHERLANDS - JUNE 15: Princess Beatrix of The Netherlands arrives at the Royal Palace for the annual palace symposium on June 15, 2017 in Amsterdam, Netherlands. Theme of the symposium is depopulation of the rural area. (Photo by Patrick van Katwijk/Getty Images)