Question: when did the thin blue line flag start
[{'answer': 'November 2016', 'provenance': [{'wikipedia_id': '11040697', 'title': 'Thin blue line', 'start_paragraph_id': 18, 'start_character': 27, 'end_paragraph_id': 18, 'end_character': 40, 'bleu_score': 1.0, 'section': 'Section::::Controversy.\n'}]}, {'provenance': [{'wikipedia_id': '11040697', 'title': 'Thin blue line', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 317, 'bleu_score': 0.957870874785216, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1094122027968273409}, 'section': 'Section::::Controversy.\n'}]}]