Complex sentence: A past president of the American Oriental Society, Rocher was elected a Member of the American Philosophical Society and of the Royal Academy of Overseas Sciences (Belgium), and a Fellow of the Asiatic Society (Calcutta) where he frequently conducted research.
Split into simpler sentences: A past president of the American Oriental Society, Rocher was elected a Member of the American Philosophical Society and of the Royal Academy of Overseas Sciences (Belgium). He was also a Fellow of the Asiatic Society (Calcutta) where he frequently conducted research.