Simplify the following text for a Grade 10 native English-speaking person.
Original: Martin David Robinson ( September 26 , 1925 -- December 8 , 1982 ) , known professionally as Marty Robbins , was an American singer , songwriter , and multi-instrumentalist .
Simplified: Marty Robbins ( real name Martin David Robinson ) ( September 26 , 1925 â `` December 8 , 1982 ) was an American country singer and songwriter .