Complex sentence: On 9 August 1942, during one such protest in Patna, Bhadrakali Mishra was arrested and imprisoned at the Bankipur Jail along with senior leaders such as Dr. Rajendra Prasad, who incidentally was a close friend of his father-in-law.
Split into simpler sentences: On 9 August 1942, during one such protest in Patna, Bhadrakali Mishra was arrested. He was imprisoned at the Bankipur Jail along with senior leaders such as Dr. Rajendra Prasad, who incidentally was a close friend of his father-in-law.