Question: when does season 12 of it's always sunny start
[{'answer': 'January 4 , 2017', 'provenance': [{'wikipedia_id': '49894891', 'title': "It's Always Sunny in Philadelphia (season 12)", 'start_paragraph_id': 1, 'start_character': 116, 'end_paragraph_id': 1, 'end_character': 132, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '49894891', 'title': "It's Always Sunny in Philadelphia (season 12)", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 198, 'bleu_score': 0.9419661180380051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3837056907432520047}, 'section': 'Section::::Abstract.'}]}]