Question: when did duke of windsor return to england
[{'answer': 'September 1939', 'provenance': [{'wikipedia_id': '18835362', 'title': 'Edward VIII', 'start_paragraph_id': 55, 'start_character': 43, 'end_paragraph_id': 55, 'end_character': 57, 'bleu_score': 1.0, 'section': 'Section::::Second World War.\n'}]}, {'provenance': [{'wikipedia_id': '18835362', 'title': 'Edward VIII', 'start_paragraph_id': 55, 'start_character': 0, 'end_paragraph_id': 55, 'end_character': 1213, 'bleu_score': 0.938520884172057, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7443063091902991560}, 'section': 'Section::::Second World War.\n'}]}]