Question: how many seasons of the mentalist were there
[{'answer': '7', 'provenance': [{'wikipedia_id': '18197600', 'title': 'The Mentalist', 'start_paragraph_id': 17, 'start_character': 83, 'end_paragraph_id': 17, 'end_character': 84, 'bleu_score': 1.0, 'section': 'Section::::Reception.:Critical reception.\n'}]}]