Complex sentence: Saeed Hajjarian studied Mechanical Engineering at Faculty of Engineering (Fanni) Tehran University and was a young Iranian revolutionary during the 1979 Iranian Revolution and was among the students who took over the US embassy in Tehran in 1979.
Split into simpler sentences: Saeed Hajjarian studied Mechanical Engineering at the Faculty of Engineering (Fanni) in Tehran University. A young Iranian revolutionary during the 1979 Iranian Revolution, he was one of the students who took over the US embassy in Tehran in 1979.