FILE - In this Feb.28, 2017 file photo, a performer from the Unidos da Tijuca samba school is carried into an ambulance after a float collapsed during Carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil. After two float accidents at the Sambadrome revelers started speaking of a curse because Rio de Janeiro Mayor Marcelo Crivella skipped the opening Carnival ceremony . (AP Photo/Silvia Izquierdo, File)
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