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WINDSOR, UNITED KINGDOM - APRIL 16: Queen Elizabeth II (3rd, R) and Prince Philip, Duke of Edinburgh (R) leave after attending the Easter Sunday service at St George's Chapel at Windsor Castle on April 16, 2017 in Windsor, England. (Photo by Jonathan Brady/WPA Pool/Getty Images)

WINDSOR, UNITED KINGDOM - APRIL 16:  Queen Elizabeth II (3rd, R) and Prince Philip, Duke of Edinburgh (R) leave after attending the Easter Sunday service at St George's Chapel at Windsor Castle on April 16, 2017 in Windsor, England. (Photo by Jonathan Brady/WPA Pool/Getty Images)