Question: who has won the heisman more than once
[{'answer': "Ohio State 's Archie Griffin", 'provenance': [{'wikipedia_id': '16096383', 'title': 'List of Heisman Trophy winners', 'start_paragraph_id': 2, 'start_character': 936, 'end_paragraph_id': 2, 'end_character': 964, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '16096383', 'title': 'List of Heisman Trophy winners', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 988, 'bleu_score': 0.988200073497952, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16632570042421360323}, 'section': 'Section::::Abstract.'}]}]