Question: when did the united states and britain become allies
[{'answer': '1900', 'provenance': [{'wikipedia_id': '1814362', 'title': 'United Kingdom–United States relations', 'start_paragraph_id': 86, 'start_character': 123, 'end_paragraph_id': 86, 'end_character': 127, 'bleu_score': 1.0, 'section': 'Section::::History.:The Great Rapprochement.\n'}]}, {'provenance': [{'wikipedia_id': '1814362', 'title': 'United Kingdom–United States relations', 'start_paragraph_id': 86, 'start_character': 0, 'end_paragraph_id': 86, 'end_character': 293, 'bleu_score': 0.885632718431904, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8734183741607658178}, 'section': 'Section::::History.:The Great Rapprochement.\n'}]}]