Question: who controlled the world at the end of the 1800s
[{'answer': 'Britain', 'provenance': [{'wikipedia_id': '4721', 'title': 'British Empire', 'start_paragraph_id': 2, 'start_character': 518, 'end_paragraph_id': 2, 'end_character': 525, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4721', 'title': 'British Empire', 'start_paragraph_id': 44, 'start_character': 0, 'end_paragraph_id': 44, 'end_character': 738, 'bleu_score': 0.9304719420045001, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10097313667236233404}, 'section': "Section::::Britain's imperial century (1815–1914).\n"}]}]