Question: how many night of the museum movies are there
[{'answer': 'three', 'provenance': [{'wikipedia_id': '42092385', 'title': 'Night at the Museum (film series)', 'start_paragraph_id': 1, 'start_character': 99, 'end_paragraph_id': 1, 'end_character': 104, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '42092385', 'title': 'Night at the Museum (film series)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 520, 'bleu_score': 0.977897140678983, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13815560760387421541}, 'section': 'Section::::Abstract.'}]}]