Question: what two japanese cities were bombed in ww2
[{'answer': 'Hiroshima', 'provenance': [{'wikipedia_id': '9559286', 'title': 'Air raids on Japan', 'start_paragraph_id': 2, 'start_character': 1284, 'end_paragraph_id': 2, 'end_character': 1293, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Nagasaki', 'provenance': [{'wikipedia_id': '9559286', 'title': 'Air raids on Japan', 'start_paragraph_id': 2, 'start_character': 1298, 'end_paragraph_id': 2, 'end_character': 1306, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '9559286', 'title': 'Air raids on Japan', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 1355, 'bleu_score': 0.9581231323208751, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10164016139940028045}, 'section': 'Section::::Abstract.'}]}]