Question: how many seasons of dragons race to the edge
[{'answer': '13', 'provenance': [{'wikipedia_id': '36665263', 'title': 'List of DreamWorks Dragons episodes', 'start_paragraph_id': 9, 'start_character': 26, 'end_paragraph_id': 9, 'end_character': 28, 'bleu_score': 1.0, 'section': 'Section::::Cartoon Network episodes.\n'}]}]