Complex sentence: During the Axis occupation of Serbia she supported the Yugoslav Partisans as a member of the student organization, and spent a year in the Banjica concentration camp from 1942 to 1943.
Split into simpler sentences: During the Axis occupation of Serbia she supported the Yugoslav Partisans, as a member of the student organization. She was imprisoned at the Banjica concentration camp from 1942 to 1943.