Complex sentence: Rajani Kanta Patir (born 1917) was an Indian Administrative Service officer; he was the former chief secretary of the Indian state of Arunachal Pradesh, retiring from that position in 1982.
Split into simpler sentences: Rajani Kanta Patir (born 1917) was an Indian Administrative Service officer. He was the chief secretary of the Indian state of Arunachal Pradesh, retiring from that position in 1982.