Question: who was the king of the akkadians who conquered all of mesopotamia
[{'answer': 'Sargon', 'provenance': [{'wikipedia_id': '1566', 'title': 'Akkadian Empire', 'start_paragraph_id': 3, 'start_character': 126, 'end_paragraph_id': 3, 'end_character': 132, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1566', 'title': 'Akkadian Empire', 'start_paragraph_id': 20, 'start_character': 48, 'end_paragraph_id': 20, 'end_character': 733, 'bleu_score': 0.702819361929069, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9196838888478183632}, 'section': 'Section::::History and development of the empire.:Sargon of Akkad.\n'}]}]