Question: when does criminal minds season 13 finale air
[{'answer': 'April 18 , 2018', 'provenance': [{'wikipedia_id': '54359118', 'title': 'Criminal Minds (season 13)', 'start_paragraph_id': 1, 'start_character': 291, 'end_paragraph_id': 1, 'end_character': 306, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '54359118', 'title': 'Criminal Minds (season 13)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 305, 'bleu_score': 0.7620662174572531, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8682337934472595099}, 'section': 'Section::::Abstract.'}]}]