Question: when does season 2 of spirit riding free come out
[{'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'}]}]