Question: which empire did the whole coast of the mediterranean sea belong to
[{'answer': 'the Roman Empire', 'provenance': [{'wikipedia_id': '19006', 'title': 'Mediterranean Sea', 'start_paragraph_id': 9, 'start_character': 104, 'end_paragraph_id': 9, 'end_character': 120, 'bleu_score': 1.0, 'section': 'Section::::Names and etymology.\n'}]}, {'provenance': [{'wikipedia_id': '19006', 'title': 'Mediterranean Sea', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 466, 'bleu_score': 0.9716239638199891, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10244241117291257352}, 'section': 'Section::::History.:Ancient civilizations.\n'}]}]