Question: how many episodes of american dad are there
[{'answer': '291'}, {'provenance': [{'wikipedia_id': '1905292', 'title': 'List of American Dad! episodes', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 626, 'bleu_score': 0.8919187110020661, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4011786252631726444}, 'section': 'Section::::Abstract.'}]}]