Question: who has thrown the most strikeouts in mlb history
[{'answer': 'Nolan Ryan', 'provenance': [{'wikipedia_id': '2976205', 'title': 'List of Major League Baseball career strikeout leaders', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 10, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2976205', 'title': 'List of Major League Baseball career strikeout leaders', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 127, 'bleu_score': 0.749881028640899, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6934692442009123868}, 'section': 'Section::::Abstract.'}]}]