Question: Who is the retired Nigerian Army general whom eventually appointed the vice admiral, Ibok-Ete Ekwe Ibas, to Chief of Naval Staff (CNS) of the Nigerian Navy?
{'answer': 'Muhammadu Buhari', 'supporting_facts': [['Ibok Ekwe Ibas', 0], ['Ibok Ekwe Ibas', 1], ['Muhammadu Buhari', 1]]}