Complex sentence: He was the personal assistant of N. G. Ranga (Professor of Economics at Pachaiyappa's College, Madras, Chennai) from 1959 to 1961; in college, he was friends with Avula Gopalakrishna Murthy, the humanist leader in Andhra.
Split into simpler sentences: He was the personal assistant of N. G. Ranga (Professor of Economics at Pachaiyappa's College, Madras, Chennai) from 1959 to 1961. During college days came closer with Avula Gopalakrishna Murthy, the humanist leader in Andhra.