Question: who was the ruler of akkad who established the first empire in sumer ca. 2340 b.c.e
[{'answer': 'Sargon of Akkad', 'provenance': [{'wikipedia_id': '1566', 'title': 'Akkadian Empire', 'start_paragraph_id': 3, 'start_character': 126, 'end_paragraph_id': 3, 'end_character': 141, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1566', 'title': 'Akkadian Empire', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 423, 'bleu_score': 0.970795021215021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12106131386923121333}, 'section': 'Section::::Abstract.'}]}]