Question: what kind of ship was the uss oklahoma
[{'answer': 'Nevada - class battleship'}, {'provenance': [{'wikipedia_id': '192181', 'title': 'USS Oklahoma (BB-37)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 182, 'bleu_score': 0.72075823842171, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15061201281009906571}, 'section': 'Section::::Abstract.'}]}]