Question: who is the youngest grand master in chess
[{'answer': 'Sergey Karjakin', 'provenance': [{'wikipedia_id': '245303', 'title': 'Chess prodigy', 'start_paragraph_id': 5, 'start_character': 225, 'end_paragraph_id': 5, 'end_character': 240, 'bleu_score': 1.0, 'section': 'Section::::List of youngest grandmasters.\n'}]}]