Question: when is the last episode of switched at birth
[{'answer': 'April 11 , 2017', 'provenance': [{'wikipedia_id': '31990324', 'title': 'List of Switched at Birth episodes', 'start_paragraph_id': 1, 'start_character': 901, 'end_paragraph_id': 1, 'end_character': 916, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31990324', 'title': 'List of Switched at Birth episodes', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 915, 'bleu_score': 0.879479854743466, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9623301522628837108}, 'section': 'Section::::Abstract.'}]}]