Question: who was elected president of the united states in 1948
[{'answer': 'Harry S. Truman', 'provenance': [{'wikipedia_id': '40562', 'title': '1948 United States presidential election', 'start_paragraph_id': 1, 'start_character': 155, 'end_paragraph_id': 1, 'end_character': 170, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '40562', 'title': '1948 United States presidential election', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 334, 'bleu_score': 0.844789442243272, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8452872344077442118}, 'section': 'Section::::Abstract.'}]}]