Question: how many episodes are in the first season of house of cards
[{'answer': '13', 'provenance': [{'wikipedia_id': '38491071', 'title': 'House of Cards (season 1)', 'start_paragraph_id': 1, 'start_character': 149, 'end_paragraph_id': 1, 'end_character': 151, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]