Question: when did the us and britain invade italy
[{'answer': '3 September 1943', 'provenance': [{'wikipedia_id': '439229', 'title': 'Allied invasion of Italy', 'start_paragraph_id': 1, 'start_character': 100, 'end_paragraph_id': 1, 'end_character': 116, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '439229', 'title': 'Allied invasion of Italy', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 623, 'bleu_score': 0.979896933041101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2672711105301535220}, 'section': 'Section::::Abstract.'}]}]