Question: when did the civil war end in sierra leone
[{'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.'}]}, {'provenance': [{'wikipedia_id': '2477816', 'title': 'Sierra Leone Civil War', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 556, 'bleu_score': 0.5479570145211641, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16123842150266805907}, 'section': 'Section::::Abstract.'}]}]