Question: who is the greatest pool player of all time
[{'answer': 'Efren Manalang Reyes', 'provenance': [{'wikipedia_id': '435887', 'title': 'Efren Reyes', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '435887', 'title': 'Efren Reyes', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 779, 'bleu_score': 0.7698392854591001, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1270685425060093531}, 'section': 'Section::::Abstract.'}]}]