Simplify the following text for a Grade 7 native English-speaking person.
Original: DenÃ lson CustÃ dio Machado , best known as DenÃ lson ( born in Campos dos Goytacazes , Rio de Janeiro State , March 28 , 1943 ) is a former Brazilian footballer in attacking midfielder role .
Simplified: DenÃ lson CustÃ dio Machado ( born 28 March , 1943 ) is a former Brazilian football player .