Question: when is marvel agents of shield season 4 coming out
[{'answer': 'September 20 , 2016', 'provenance': [{'wikipedia_id': '49635999', 'title': 'Agents of S.H.I.E.L.D. (season 4)', 'start_paragraph_id': 73, 'start_character': 55, 'end_paragraph_id': 73, 'end_character': 74, 'bleu_score': 1.0, 'section': 'Section::::Release.:Broadcast.\n'}]}, {'provenance': [{'wikipedia_id': '49635999', 'title': 'Agents of S.H.I.E.L.D. (season 4)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 744, 'bleu_score': 0.984188478234951, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7413652828858214032}, 'section': 'Section::::Abstract.'}]}]