Question: which nation is on the horn of africa
[{'answer': 'Djibouti', 'provenance': [{'wikipedia_id': '62142', 'title': 'Horn of Africa', 'start_paragraph_id': 1, 'start_character': 411, 'end_paragraph_id': 1, 'end_character': 419, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Eritrea', 'provenance': [{'wikipedia_id': '62142', 'title': 'Horn of Africa', 'start_paragraph_id': 1, 'start_character': 421, 'end_paragraph_id': 1, 'end_character': 428, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Ethiopia', 'provenance': [{'wikipedia_id': '62142', 'title': 'Horn of Africa', 'start_paragraph_id': 1, 'start_character': 430, 'end_paragraph_id': 1, 'end_character': 438, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Somalia', 'provenance': [{'wikipedia_id': '62142', 'title': 'Horn of Africa', 'start_paragraph_id': 1, 'start_character': 444, 'end_paragraph_id': 1, 'end_character': 451, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '62142', 'title': 'Horn of Africa', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 451, 'bleu_score': 0.579128057590934, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5450026028458454561}, 'section': 'Section::::Abstract.'}]}]