Question: the current chief of naval staff in nigeria
[{'answer': 'Ibok Ekwe Ibas', 'provenance': [{'wikipedia_id': '47274431', 'title': 'Chief of Naval Staff (Nigeria)', 'start_paragraph_id': 4, 'start_character': 36, 'end_paragraph_id': 4, 'end_character': 50, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]