Simplify the following text for a Grade 6 native English-speaking person.
Original: Marlene Dietrich ; ( December 27 , 1901 â `` May 6 , 1992 ) was a German actress , singer , and entertainer .
Simplified: Marlene Dietrich ( ; 27 December 1901 â `` 6 May 1992 ) was a German actress and singer .