Question: how many seasons are in person of interest
[{'answer': '5', 'provenance': [{'wikipedia_id': '31770697', 'title': 'Person of Interest (TV series)', 'start_paragraph_id': 81, 'start_character': 323, 'end_paragraph_id': 81, 'end_character': 324, 'bleu_score': 1.0, 'section': 'Section::::Computer systems.:The Machine.\n'}]}]