Complex sentence: Shabina refused to attend for three years unless she was allowed to wear the jilbab to school She believed that this was required by her Muslim faith, in contravention of the school uniform policy.
Split into simpler sentences: Shabina refused to attend for three years unless she was allowed to wear the jilbab to school. She said she believed that this was required by her Muslim faith, in contravention of the school uniform policy.