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THE HAGUE, NETHERLANDS - APRIL 20: King Willem-Alexander walks to his Palace Noordeinde after a car blocked the road on April 20, 2017 in The Hague, Netherlands. The King will a reception at the palace for his staff ahead his 50th birthday April 27th. (Photo by Patrick van Katwijk/Getty Images)

THE HAGUE, NETHERLANDS - APRIL 20: King Willem-Alexander walks to his Palace Noordeinde after a car blocked the road on April 20, 2017 in The Hague, Netherlands. The King will a reception at the palace for his staff ahead his 50th birthday April 27th.    (Photo by Patrick van Katwijk/Getty Images)