Question: who is the only kaurava who survived the kurukshetra war
[{'answer': 'Yuyutsu', 'provenance': [{'wikipedia_id': '5081121', 'title': 'Yuyutsu', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5081121', 'title': 'Yuyutsu', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 333, 'bleu_score': 0.888384713567787, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7484562449373067872}, 'section': 'Section::::Abstract.'}]}]