Question: who was president of the united states in 1958
[{'answer': 'Dwight D. Eisenhower', 'provenance': [{'wikipedia_id': '24807726', 'title': '1958 in the United States', 'start_paragraph_id': 4, 'start_character': 23, 'end_paragraph_id': 4, 'end_character': 42, 'bleu_score': 1.0, 'section': 'Section::::Incumbents.:Federal government.\n'}]}, {'provenance': [{'wikipedia_id': '24807726', 'title': '1958 in the United States', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 62, 'bleu_score': 0.7598356856515921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2538027241048298625}, 'section': 'Section::::Incumbents.:Federal government.\n'}]}]