Question: what is the biggest john deere tractor in the world
[{'answer': 'John Deere 9630', 'provenance': [{'wikipedia_id': '27370057', 'title': 'John Deere 9630', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '27370057', 'title': 'John Deere 9630', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 540, 'bleu_score': 0.7431911885882581, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8597391807176705832}, 'section': 'Section::::Abstract.'}]}]