Question: how many seasons are there for walker texas ranger
[{'answer': '8', 'provenance': [{'wikipedia_id': '4337753', 'title': 'List of Walker, Texas Ranger episodes', 'start_paragraph_id': 6, 'start_character': 34, 'end_paragraph_id': 6, 'end_character': 35, 'bleu_score': 1.0, 'section': 'Section::::Episodes.:Season 1 (1993–94).\n'}]}]