Question: how many seasons are there of knight rider
[{'answer': 'four', 'provenance': [{'wikipedia_id': '35196753', 'title': 'Knight Rider', 'start_paragraph_id': 1, 'start_character': 113, 'end_paragraph_id': 1, 'end_character': 117, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '35196753', 'title': 'Knight Rider', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 375, 'bleu_score': 0.594383234855356, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3256480665306997439}, 'section': 'Section::::Overview.\n'}]}]