Question: when will spirit riding free season 6 come out
[{'answer': 'August 17 , 2018', 'provenance': [{'wikipedia_id': '53821955', 'title': 'Spirit Riding Free', 'start_paragraph_id': 23, 'start_character': 423, 'end_paragraph_id': 23, 'end_character': 439, 'bleu_score': 1.0, 'section': 'Section::::Production.\n'}]}]