Question: when is spirit riding free season 5 coming out
[{'answer': 'May 11 , 2018', 'provenance': [{'wikipedia_id': '53821955', 'title': 'Spirit Riding Free', 'start_paragraph_id': 23, 'start_character': 355, 'end_paragraph_id': 23, 'end_character': 368, 'bleu_score': 1.0, 'section': 'Section::::Production.\n'}]}]