Question: where is the us navy base in japan located
[{'answer': 'Yokosuka', 'provenance': [{'wikipedia_id': '1527263', 'title': 'United States Fleet Activities Yokosuka', 'start_paragraph_id': 0, 'start_character': 31, 'end_paragraph_id': 0, 'end_character': 39, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]