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AMSTERDAM, NETHERLANDS - APRIL 30: King Willem-Alexander of the Netherlands takes an oath as he stands alongside Queen Maxima of the Netherlands (R) during his swearing in and investiture ceremony in front of the two houses of the States General in the Nieuwe Kerk on April 30, 2013 in Amsterdam, Netherlands. (Photo by Lex Van Lieshout - Pool/Getty Images)

AMSTERDAM, NETHERLANDS - APRIL 30:  King Willem-Alexander of the Netherlands takes an oath as he stands alongside Queen Maxima of the Netherlands (R) during his swearing in and investiture ceremony in front of the two houses of the States General in the Nieuwe Kerk on April 30, 2013 in Amsterdam, Netherlands.  (Photo by Lex Van Lieshout - Pool/Getty Images)