Question: how many episodes in series 2 of the exorcist
[{'answer': '20', 'provenance': [{'wikipedia_id': '50506286', 'title': 'The Exorcist (TV series)', 'start_paragraph_id': 1, 'start_character': 119, 'end_paragraph_id': 1, 'end_character': 121, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]