Question: who did the us get their independence from
[{'answer': 'British Empire'}, {'provenance': [{'wikipedia_id': '781729', 'title': 'Independence Day (United States)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 452, 'bleu_score': 0.530353410059423, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18015302803833610419}, 'section': 'Section::::Abstract.'}]}]