Simplify the following text for a Grade 8 native English-speaking person.
Original: SÃ rgio Bernardino , also known as Serginho or Serginho Chulapa ( born in SÃ # o Paulo , December 23 , 1953 ) was a Brazilian football striker .
Simplified: Serginho Chulapa ( born 23 December , 1953 ) is a former Brazilian football player .