Question: what is the currency used in sierra leone
[{'answer': 'leone', 'provenance': [{'wikipedia_id': '604855', 'title': 'Sierra Leonean leone', 'start_paragraph_id': 0, 'start_character': 15, 'end_paragraph_id': 0, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '604855', 'title': 'Sierra Leonean leone', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 166, 'bleu_score': 0.9364250605898111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9194531810608201978}, 'section': 'Section::::Abstract.'}]}]