Question: what is the capital of sierra leone africa
[{'answer': 'Freetown', 'provenance': [{'wikipedia_id': '27308', 'title': 'Sierra Leone', 'start_paragraph_id': 1, 'start_character': 411, 'end_paragraph_id': 1, 'end_character': 419, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]