Question: when did the first episode of chicago pd air
[{'answer': 'January 8 , 2014', 'provenance': [{'wikipedia_id': '42331761', 'title': 'List of Chicago P.D. episodes', 'start_paragraph_id': 1, 'start_character': 249, 'end_paragraph_id': 1, 'end_character': 265, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '42331761', 'title': 'List of Chicago P.D. episodes', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 363, 'bleu_score': 0.9679895851501501, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16712870925516818436}, 'section': 'Section::::Abstract.'}]}]