Question: who is called the father of ayurveda in ancient india
[{'answer': 'Charaka', 'provenance': [{'wikipedia_id': '297184', 'title': 'Charaka', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '297184', 'title': 'Charaka', 'start_paragraph_id': 1, 'start_character': 19, 'end_paragraph_id': 1, 'end_character': 485, 'bleu_score': 0.7014660018773331, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13151766846197788522}, 'section': 'Section::::Abstract.'}]}]