Question: natya shastra the main source of indian classical dances was written by
[{'answer': 'Bharata Muni', 'provenance': [{'wikipedia_id': '702661', 'title': 'Natya Shastra', 'start_paragraph_id': 1, 'start_character': 132, 'end_paragraph_id': 1, 'end_character': 144, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '702661', 'title': 'Natya Shastra', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 266, 'bleu_score': 0.9000283069718911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14185730172512840646}, 'section': 'Section::::Abstract.'}]}]