Question: how many books are in the lord of rings
[{'answer': 'three volumes', 'provenance': [{'wikipedia_id': '29798', 'title': 'The Lord of the Rings', 'start_paragraph_id': 3, 'start_character': 276, 'end_paragraph_id': 3, 'end_character': 289, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'six books , two per volume'}, {'provenance': [{'wikipedia_id': '29798', 'title': 'The Lord of the Rings', 'start_paragraph_id': 3, 'start_character': 48, 'end_paragraph_id': 3, 'end_character': 763, 'bleu_score': 0.9839344367380701, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6483778106699527070}, 'section': 'Section::::Abstract.'}]}]