Question: who was us president when nasa was established
[{'answer': 'Dwight D. Eisenhower', 'provenance': [{'wikipedia_id': '18426568', 'title': 'NASA', 'start_paragraph_id': 5, 'start_character': 677, 'end_paragraph_id': 5, 'end_character': 697, 'bleu_score': 1.0, 'section': 'Section::::Creation.\n'}]}]