Simplify the following text for a Grade 7 native English-speaking person.
Original: AntÃ nio Monteiro Dutra or simply Dutra ( born August 11 , 1973 in Duque Bacelar-MA ) , is a Brazilian left back .
Simplified: AntÃ nio Monteiro Dutra ( born 11 August 1973 ) is a Brazilian football player .