Question: when did japan first emerge as a modern empire
[{'answer': '1868', 'provenance': [{'wikipedia_id': '183897', 'title': 'Empire of Japan', 'start_paragraph_id': 1, 'start_character': 95, 'end_paragraph_id': 1, 'end_character': 99, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '183897', 'title': 'Empire of Japan', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 157, 'bleu_score': 0.625731040868868, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15170966304615959627}, 'section': 'Section::::Abstract.'}]}]