Question: how many house of cards seasons are there
[{'answer': '5', 'provenance': [{'wikipedia_id': '32670973', 'title': 'House of Cards (American TV series)', 'start_paragraph_id': 2, 'start_character': 141, 'end_paragraph_id': 2, 'end_character': 142, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]