Question: what does a sfc do in the army
[{'answer': 'tactical logistics', 'provenance': [{'wikipedia_id': '288435', 'title': 'Sergeant first class', 'start_paragraph_id': 4, 'start_character': 450, 'end_paragraph_id': 4, 'end_character': 468, 'bleu_score': 1.0, 'section': 'Section::::United States Army.\n'}]}, {'answer': 'tactical casualty evacuations', 'provenance': [{'wikipedia_id': '288435', 'title': 'Sergeant first class', 'start_paragraph_id': 4, 'start_character': 470, 'end_paragraph_id': 4, 'end_character': 499, 'bleu_score': 1.0, 'section': 'Section::::United States Army.\n'}]}, {'answer': 'serving as the senior tactical adviser to the platoon leader'}, {'provenance': [{'wikipedia_id': '288435', 'title': 'Sergeant first class', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 817, 'bleu_score': 0.966433137724063, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2975082600166576108}, 'section': 'Section::::United States Army.\n'}]}]