Question: how many islands are in the cayman islands
[{'answer': 'three', 'provenance': [{'wikipedia_id': '5468', 'title': 'Cayman Islands', 'start_paragraph_id': 1, 'start_character': 129, 'end_paragraph_id': 1, 'end_character': 134, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]