Question: who built the guajataca dam in puerto rico
[{'answer': 'Puerto Rico Electric Power Authority', 'provenance': [{'wikipedia_id': '13300928', 'title': 'Guajataca Lake', 'start_paragraph_id': 1, 'start_character': 65, 'end_paragraph_id': 1, 'end_character': 101, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '13300928', 'title': 'Guajataca Lake', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 378, 'bleu_score': 0.96746874041754, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12579026814708679254}, 'section': 'Section::::Abstract.'}]}]