Question: who lead the second military coup in nigeria
[{'answer': 'Lt. Colonel Murtala Muhammed', 'provenance': [{'wikipedia_id': '15785345', 'title': '1966 Nigerian counter-coup', 'start_paragraph_id': 1, 'start_character': 138, 'end_paragraph_id': 1, 'end_character': 166, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '15785345', 'title': '1966 Nigerian counter-coup', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 815, 'bleu_score': 0.9346490311046831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12001127951553082006}, 'section': 'Section::::Abstract.'}]}]