Question: who has the highest elo rating in chess
[{'answer': 'Magnus Carlsen', 'provenance': [{'wikipedia_id': '1710426', 'title': 'Comparison of top chess players throughout history', 'start_paragraph_id': 44, 'start_character': 1238, 'end_paragraph_id': 44, 'end_character': 1252, 'bleu_score': 1.0, 'section': 'Section::::Moves played compared with computer choices.:Markovian Model.\n'}]}]