Question: who was president in america during world war 2
[{'answer': 'Franklin Delano Roosevelt', 'provenance': [{'wikipedia_id': '1113586', 'title': 'Politics of the United States during World War II', 'start_paragraph_id': 3, 'start_character': 123, 'end_paragraph_id': 3, 'end_character': 148, 'bleu_score': 1.0, 'section': 'Section::::Overview.\n'}]}, {'answer': 'Harry S. Truman', 'provenance': [{'wikipedia_id': '1113586', 'title': 'Politics of the United States during World War II', 'start_paragraph_id': 5, 'start_character': 270, 'end_paragraph_id': 5, 'end_character': 285, 'bleu_score': 1.0, 'section': 'Section::::President of the United States.\n'}]}, {'provenance': [{'wikipedia_id': '1113586', 'title': 'Politics of the United States during World War II', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 446, 'bleu_score': 0.9754554449993441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10646918484464003789}, 'section': 'Section::::President of the United States.\n'}]}]