Question: the author of the play/book ratnawali is
[{'answer': 'Harsha', 'provenance': [{'wikipedia_id': '4304529', 'title': 'Ratnavali', 'start_paragraph_id': 1, 'start_character': 145, 'end_paragraph_id': 1, 'end_character': 151, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4304529', 'title': 'Ratnavali', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 308, 'bleu_score': 0.900181664963514, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14808030263558102325}, 'section': 'Section::::Abstract.'}]}]