Complex sentence: On her return, she was sent to Kimmins High School, a girls boarding school at Panchgani, where she received her early education, later she did her graduation from St. Xavier's College, Bombay (1965--67).
Split into simpler sentences: On her return, she was sent to Kimmins High School, Panchgani, where she received her early education. She did her graduation from St. Xavier's College, Bombay (1965--67).