Complex sentence: He appeared in such films as "The Blue Angel" opposite Marlene Dietrich and was offered a trip to Hollywood but refused and stayed behind in Germany where he was interred in the Theresienstadt concentration camp.
Split into simpler sentences: He appeared in such films as "The Blue Angel" opposite Marlene Dietrich. He was offered a trip to Hollywood but refused and stayed behind in Germany, where he was interred in the Theresienstadt concentration camp.