Question: when did the 7.1 earthquake in mexico happen
[{'answer': '19 September 2017', 'provenance': [{'wikipedia_id': '55287670', 'title': '2017 Puebla earthquake', 'start_paragraph_id': 1, 'start_character': 62, 'end_paragraph_id': 1, 'end_character': 79, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '55287670', 'title': '2017 Puebla earthquake', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 500, 'bleu_score': 0.7808879817965251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10654609558562038461}, 'section': 'Section::::Abstract.'}]}]