Question: who was blamed for the uss maine explosion
[{'answer': 'Spain', 'provenance': [{'wikipedia_id': '189610', 'title': 'USS Maine (ACR-1)', 'start_paragraph_id': 1, 'start_character': 352, 'end_paragraph_id': 1, 'end_character': 357, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]