Question: when was the first bullet train in japan
[{'answer': '1 October 1964', 'provenance': [{'wikipedia_id': '92516', 'title': 'Shinkansen', 'start_paragraph_id': 20, 'start_character': 40, 'end_paragraph_id': 20, 'end_character': 54, 'bleu_score': 1.0, 'section': 'Section::::History.:Initial success.\n'}]}, {'provenance': [{'wikipedia_id': '92516', 'title': 'Shinkansen', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 839, 'bleu_score': 0.9685451587663261, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11965420614417685763}, 'section': 'Section::::History.:Initial success.\n'}]}]