Task: Explanation
Input (English): S. R. D. Vaidyanathan (Tamil: S.R.D. வைத்தியநாதன்; 15 March 1929 − 18 November 2013) was an Indian musician who played the Nadhaswara. Question: What reed instrument was played by Indian musician S. R. D. Vaidyanathan? Answer: the Nadhaswara
Output (English): S. R. D. Vaidyanathan Tamil: S.R.D. வைத்தியநாதன்; 15 March 1929 − 18 November 2013 was an Indian musician who played the Nadhaswara.