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AMSTERDAM, NETHERLANDS - MAY 4: Dutch King Willem-Alexander and Queen Maxima attend a ceremony at the Dam Memorial during the annual Remembrance Day ceremony in Amsterdam, Netherlands, on May 4, 2019. The ceremony commemorates civilians and Dutch soldiers who have died in wars or peacekeeping missions since the outbreak of the Second World War. (Photo by Abdullah Asiran/Anadolu Agency/Getty Images)

AMSTERDAM, NETHERLANDS - MAY 4:  Dutch King Willem-Alexander and Queen Maxima attend a ceremony  at the Dam Memorial during the annual Remembrance Day ceremony in Amsterdam, Netherlands, on May 4, 2019. The ceremony commemorates civilians and Dutch soldiers who have died in wars or peacekeeping missions since the outbreak of the Second World War. (Photo by Abdullah Asiran/Anadolu Agency/Getty Images)