Question: when did dade county become miami dade county
[{'answer': 'November 13 , 1997', 'provenance': [{'wikipedia_id': '27905225', 'title': 'Miami-Dade County, Florida', 'start_paragraph_id': 18, 'start_character': 3, 'end_paragraph_id': 18, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::History.:Name change.\n'}]}, {'provenance': [{'wikipedia_id': '27905225', 'title': 'Miami-Dade County, Florida', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 714, 'bleu_score': 0.964583525681703, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1176751770806707242}, 'section': 'Section::::History.:Name change.\n'}]}]