Question: who was the man who said let's roll
[{'answer': 'Todd Morgan Beamer', 'provenance': [{'wikipedia_id': '11848451', 'title': 'Todd Beamer', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '11848451', 'title': 'Todd Beamer', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 406, 'bleu_score': 0.7336822240908341, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6632773894879486113}, 'section': 'Section::::Abstract.'}]}]