Question: when does spirit riding free season 2 start
[{'answer': 'September 8 , 2017', 'provenance': [{'wikipedia_id': '53821955', 'title': 'Spirit Riding Free', 'start_paragraph_id': 23, 'start_character': 122, 'end_paragraph_id': 23, 'end_character': 140, 'bleu_score': 1.0, 'section': 'Section::::Production.\n'}]}, {'provenance': [{'wikipedia_id': '53821955', 'title': 'Spirit Riding Free', 'start_paragraph_id': 23, 'start_character': 0, 'end_paragraph_id': 23, 'end_character': 390, 'bleu_score': 0.5563749259008031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4759550826950224667}, 'section': 'Section::::Production.\n'}]}]