Question: who was the president during cuban missle crisis
[{'answer': 'John F. Kennedy', 'provenance': [{'wikipedia_id': '6827', 'title': 'Cuban Missile Crisis', 'start_paragraph_id': 4, 'start_character': 88, 'end_paragraph_id': 4, 'end_character': 103, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6827', 'title': 'Cuban Missile Crisis', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 581, 'bleu_score': 0.914178158656576, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2041609678998037633}, 'section': 'Section::::Abstract.'}]}]