Question: who is the commander in chief of military
[{'answer': 'President of the United States', 'provenance': [{'wikipedia_id': '254428', 'title': 'Commander-in-chief', 'start_paragraph_id': 156, 'start_character': 70, 'end_paragraph_id': 156, 'end_character': 100, 'bleu_score': 0.668740304976422, 'section': 'Section::::Heads of state as commanders-in-chief.:United States.\n'}]}]