On July 15, Argentina beat England 2-1 in a World Cup semifinal; during post-match celebrations, Argentine players held a banner handed over by fans in the stands, reading ‘Las Malvinas son Argentinas’— ‘The Malvinas are Argentine.’ Argentina defeated England 2-1 in the FIFA World Cup semifinal on Wednesday in Atlanta. During the post-match celebrations, Argentine players posed with a banner handed to them by supporters in the stands that read, "Las Malvinas son Argentinas" ("The Malvinas are Argentine").
Argentina refers to the Falkland Islands as Islas Malvinas.
Summary from source