Question: how many episodes are there in vanity fair on itv
[{'answer': '7', 'provenance': [{'wikipedia_id': '58379044', 'title': 'Vanity Fair (2018 TV series)', 'start_paragraph_id': 1, 'start_character': 45, 'end_paragraph_id': 1, 'end_character': 46, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]