Question: when was the peace treaty with japan signed
[{'answer': 'September 8 , 1951', 'provenance': [{'wikipedia_id': '253688', 'title': 'Treaty of San Francisco', 'start_paragraph_id': 12, 'start_character': 468, 'end_paragraph_id': 12, 'end_character': 486, 'bleu_score': 1.0, 'section': "Section::::Stances.:Soviet Union's opposition to the treaty.\n"}]}, {'provenance': [{'wikipedia_id': '253688', 'title': 'Treaty of San Francisco', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 565, 'bleu_score': 0.7913134513577971, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15306263074084629896}, 'section': 'Section::::Abstract.'}]}]