Complex sentence: Due to efforts by his brother Prof. Kazem Rajavi, he was not executed and remained in prison until released by the people during the revolution in 1979.Rajavi was then serving a life sentence after his death sentence was commuted as a result of international pressure.
Split into simpler sentences: Due to efforts by his brother Prof. Kazem Rajavi, he was not executed and remained in prison until released by the people during the revolution in 1979. His death sentence was commuted as a result of international pressure.