FILE - In this Feb.28, 2017 file photo, rescuers, upper left, prepare to carry an injured performer from the Unidos da Tijuca samba school out of a float after it 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)
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