Question: when did the civil war in south sudan start
[{'answer': 'December 2013', 'provenance': [{'wikipedia_id': '41382446', 'title': 'South Sudanese Civil War', 'start_paragraph_id': 1, 'start_character': 126, 'end_paragraph_id': 1, 'end_character': 139, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '41382446', 'title': 'South Sudanese Civil War', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1416, 'bleu_score': 0.9507962508711241, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8303944561118081296}, 'section': 'Section::::Abstract.'}]}]