Question: when did the movie knock knock come out
[{'answer': '2015', 'provenance': [{'wikipedia_id': '43465362', 'title': 'Knock Knock (2015 film)', 'start_paragraph_id': 0, 'start_character': 13, 'end_paragraph_id': 0, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '43465362', 'title': 'Knock Knock (2015 film)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 530, 'bleu_score': 0.91970424193941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12702031286401913096}, 'section': 'Section::::Abstract.'}]}]