Question: when did ghana win african cup of nations
[{'answer': '1963', 'provenance': [{'wikipedia_id': '250680', 'title': 'Africa Cup of Nations', 'start_paragraph_id': 12, 'start_character': 3, 'end_paragraph_id': 12, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::History.:1960s: Ghanaian domination.\n'}]}, {'answer': '1965', 'provenance': [{'wikipedia_id': '250680', 'title': 'Africa Cup of Nations', 'start_paragraph_id': 13, 'start_character': 3, 'end_paragraph_id': 13, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::History.:1960s: Ghanaian domination.\n'}]}, {'answer': '1978', 'provenance': [{'wikipedia_id': '250680', 'title': 'Africa Cup of Nations', 'start_paragraph_id': 16, 'start_character': 899, 'end_paragraph_id': 16, 'end_character': 903, 'bleu_score': 1.0, 'section': 'Section::::History.:1970s: A decade of champions.\n'}]}, {'answer': '1982', 'provenance': [{'wikipedia_id': '250680', 'title': 'Africa Cup of Nations', 'start_paragraph_id': 13, 'start_character': 120, 'end_paragraph_id': 13, 'end_character': 124, 'bleu_score': 1.0, 'section': 'Section::::History.:1960s: Ghanaian domination.\n'}]}]