Task: Explanation
Input (English): The nadaswaram, nagaswaram, nadhaswaram or nathaswaram is a double reed wind instrument. It is a traditional classical instrument used in Tamilnadu, Andhra Pradesh, Karnataka, and Kerala. Question: What reed instrument was played by Indian musician S. R. D. Vaidyanathan? Answer: the Nadhaswara
Output (English): The nadaswaram, nagaswaram, nadhaswaram or nathaswaram is a double reed wind instrument.