Question: who did the us get oregon country from
[{'answer': 'The British', 'provenance': [{'wikipedia_id': '357621', 'title': 'Oregon Territory', 'start_paragraph_id': 7, 'start_character': 550, 'end_paragraph_id': 7, 'end_character': 561, 'bleu_score': 1.0, 'section': 'Section::::Formation.\n'}]}, {'provenance': [{'wikipedia_id': '357621', 'title': 'Oregon Territory', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 718, 'bleu_score': 0.9826823455989031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 538428824995244714}, 'section': 'Section::::Formation.\n'}]}]