Complex sentence: He graduated in Medicine and trauma surgery at University of Milan in 1978, where he was also a prominent leader for the security service of the Marxist-Leninist student organization Movimento Studentesco.
Split into simpler sentences: He graduated in Medicine and trauma surgery at University of Milan in 1978. During his undergaduate years, he was also a prominent leader for the security service of the Marxist-Leninist student organization Movimento Studentesco.