Question: where is yokota air force base in japan
[{'answer': 'Fussa', 'provenance': [{'wikipedia_id': '492400', 'title': 'Yokota Air Base', 'start_paragraph_id': 1, 'start_character': 99, 'end_paragraph_id': 1, 'end_character': 104, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]