Question: how many books are in a tale of two cities
[{'answer': 'three', 'provenance': [{'wikipedia_id': '3433040', 'title': 'A Tale of Two Cities', 'start_paragraph_id': 16, 'start_character': 229, 'end_paragraph_id': 16, 'end_character': 234, 'bleu_score': 1.0, 'section': 'Section::::Synopsis.:Book the Second: The Golden Thread.\n'}]}, {'provenance': [{'wikipedia_id': '3433040', 'title': 'A Tale of Two Cities', 'start_paragraph_id': 81, 'start_character': 0, 'end_paragraph_id': 81, 'end_character': 942, 'bleu_score': 0.9884053071617651, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7998838780988791528}, 'section': 'Section::::Analysis.:Themes.:Resurrection.\n'}]}]