Simplify the following text for a Grade 9 native English-speaking person.
Original: Romy Schneider ( September 23 , 1938 - May 29 , 1982 ) is an Austrian actress who enjoyed an international career , though mostly based in France .
Simplified: Romy Schneider ( 23 September 1938-29 May 1982 ) was a German film actress who was born in Austria and also held French citizenship .