Question: who composed the tune of national anthem of india
[{'answer': 'Rabindranath Tagore', 'provenance': [{'wikipedia_id': '56280', 'title': 'Jana Gana Mana', 'start_paragraph_id': 1, 'start_character': 123, 'end_paragraph_id': 1, 'end_character': 142, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]