Question: how many seasons of bob ross was there
[{'answer': '31', 'provenance': [{'wikipedia_id': '290469', 'title': 'The Joy of Painting', 'start_paragraph_id': 39, 'start_character': 18, 'end_paragraph_id': 39, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Episodes.:Season 2 (1983).\n'}]}]