Question: who took the african cup of nations 2017
[{'answer': 'Cameroon', 'provenance': [{'wikipedia_id': '29028116', 'title': '2017 Africa Cup of Nations', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 8, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '29028116', 'title': '2017 Africa Cup of Nations', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 90, 'bleu_score': 0.6540585844910971, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1537223372769492852}, 'section': 'Section::::Abstract.'}]}]