Question: who was president during the bay of pigs invasion
[{'answer': 'John F. Kennedy', 'provenance': [{'wikipedia_id': '184511', 'title': 'Bay of Pigs Invasion', 'start_paragraph_id': 3, 'start_character': 513, 'end_paragraph_id': 3, 'end_character': 528, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '184511', 'title': 'Bay of Pigs Invasion', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 578, 'bleu_score': 0.86320566553744, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15293446409395664763}, 'section': 'Section::::Abstract.'}]}]