Question: who brought the civil war to an end in april 1865
[{'answer': 'President Johnson', 'provenance': [{'wikipedia_id': '21546927', 'title': 'Conclusion of the American Civil War', 'start_paragraph_id': 4, 'start_character': 1334, 'end_paragraph_id': 4, 'end_character': 1351, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '21546927', 'title': 'Conclusion of the American Civil War', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 1407, 'bleu_score': 0.9795519354525231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1288447490771361178}, 'section': 'Section::::Abstract.'}]}]