Question: where did the ancient civilization of sumer develop
[{'answer': 'modern - day southern Iraq', 'provenance': [{'wikipedia_id': '50521', 'title': 'Sumer', 'start_paragraph_id': 1, 'start_character': 94, 'end_paragraph_id': 1, 'end_character': 119, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '50521', 'title': 'Sumer', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 609, 'bleu_score': 0.7246530377668731, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1499467434636681113}, 'section': 'Section::::Abstract.'}]}]