Question: who was the greatest ruler of the satavahanas
[{'answer': 'Gautamiputra Satakarni', 'provenance': [{'wikipedia_id': '1458025', 'title': 'Satavahana dynasty', 'start_paragraph_id': 2, 'start_character': 378, 'end_paragraph_id': 2, 'end_character': 400, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1458025', 'title': 'Satavahana dynasty', 'start_paragraph_id': 29, 'start_character': 0, 'end_paragraph_id': 29, 'end_character': 829, 'bleu_score': 0.9143080143931621, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5721552710290031496}, 'section': 'Section::::History.:First revival.\n'}]}]