Question: how many episodes of the secret circle are there
[{'answer': '22', 'provenance': [{'wikipedia_id': '31050747', 'title': 'The Secret Circle (TV series)', 'start_paragraph_id': 1, 'start_character': 532, 'end_paragraph_id': 1, 'end_character': 534, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]