Question: where are most us troops in japan stationed
[{'answer': 'Okinawa', 'provenance': [{'wikipedia_id': '378488', 'title': 'United States Forces Japan', 'start_paragraph_id': 9, 'start_character': 76, 'end_paragraph_id': 9, 'end_character': 83, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '378488', 'title': 'United States Forces Japan', 'start_paragraph_id': 16, 'start_character': 0, 'end_paragraph_id': 16, 'end_character': 151, 'bleu_score': 0.8266114125804571, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3163982326887142271}, 'section': 'Section::::United States presence debate.\n'}]}]