Question: how many lord of the rings films were there
[{'answer': 'three', 'provenance': [{'wikipedia_id': '414113', 'title': 'The Lord of the Rings (film series)', 'start_paragraph_id': 1, 'start_character': 42, 'end_paragraph_id': 1, 'end_character': 47, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]