Question: when did the first 7 11 store open
[{'answer': '1927', 'provenance': [{'wikipedia_id': '47420', 'title': '7-Eleven', 'start_paragraph_id': 1, 'start_character': 124, 'end_paragraph_id': 1, 'end_character': 128, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '47420', 'title': '7-Eleven', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 601, 'bleu_score': 0.978606533029418, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16065535127554865354}, 'section': 'Section::::History.\n'}]}]