Simplify the following text for a Grade 7 native English-speaking person.
Original: Von Arendt was born in GÃ rlitz , Kingdom of Prussia on 19 July 1898 , and became a stage designer ; he joined the SS in 1931 and the NSDAP in 1932 .
Simplified: Von Arendt was born in GÃ rlitz on July 19 1898 , and worked as a stage designer ; he joined the SS in 1931 and the NSDAP in 1932 .