Complex sentence: During World War II she was a member of an underground newspaper group, was arrested by the Gestapo in 1942 and imprisoned at Grini, and sent to the Ravensbrück concentration camp in 1943.
Split into simpler sentences: During World War II she was a member of an underground newspaper group and was arrested by the Gestapo in 1942. She was imprisoned at Grini, and sent to the Ravensbrück concentration camp in 1943.