Question: who played the sergeant major in we were soldiers
[{'answer': 'Sam Elliott', 'provenance': [{'wikipedia_id': '333026', 'title': 'Basil L. Plumley', 'start_paragraph_id': 6, 'start_character': 403, 'end_paragraph_id': 6, 'end_character': 414, 'bleu_score': 1.0, 'section': 'Section::::Military career.\n'}]}, {'provenance': [{'wikipedia_id': '333026', 'title': 'Basil L. Plumley', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 232, 'bleu_score': 0.955027111100031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9581194448450782247}, 'section': 'Section::::In popular culture.\n'}]}]