Question: when does season 2 of iron fist begin
[{'answer': 'September 7 , 2018', 'provenance': [{'wikipedia_id': '54620516', 'title': 'Iron Fist (season 2)', 'start_paragraph_id': 48, 'start_character': 78, 'end_paragraph_id': 48, 'end_character': 96, 'bleu_score': 1.0, 'section': 'Section::::Release.\n'}]}, {'provenance': [{'wikipedia_id': '54620516', 'title': 'Iron Fist (season 2)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 236, 'bleu_score': 0.948006874591591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4306438286307556202}, 'section': 'Section::::Abstract.'}]}]