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SYDNEY, AUSTRALIA - NOVEMBER 03: King Willem-Alexander (2nd L) watches on as Queen Maxima of the Netherlands observes creatures used in fertilizing the earth for farming during their visit to Cockatoo Island on November 3, 2016 in Sydney Harbour, Australia. (Photo by Jason Reed - Pool/Getty Images)

SYDNEY, AUSTRALIA - NOVEMBER 03: King Willem-Alexander (2nd L) watches on as Queen Maxima of the Netherlands observes creatures used in fertilizing the earth for farming during their visit to Cockatoo Island on November 3, 2016 in Sydney Harbour, Australia. (Photo by Jason Reed - Pool/Getty Images)