Question: when did the sierra leone civil war end
[{'answer': '18 January 2002', 'provenance': [{'wikipedia_id': '2477816', 'title': 'Sierra Leone Civil War', 'start_paragraph_id': 5, 'start_character': 360, 'end_paragraph_id': 5, 'end_character': 375, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]