Question: What president was assassinated in an explosion on August 1981, and was succeeded by a man elected as the new Supreme Leader by the Assembly of Experts on 4 June 1989 at the age of 49?
{'answer': 'President Mohammad-Ali Rajai', 'supporting_facts': [['Government of Mir-Hossein Mousavi (1985–89)', 0], ['Ali Khamenei', 1]]}