Question: bay of pigs was a failed attempt to overthrow who
[{'answer': 'Fidel Castro', 'provenance': [{'wikipedia_id': '184511', 'title': 'Bay of Pigs Invasion', 'start_paragraph_id': 1, 'start_character': 607, 'end_paragraph_id': 1, 'end_character': 619, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '184511', 'title': 'Bay of Pigs Invasion', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 785, 'bleu_score': 0.8237539101151211, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17216361032902472402}, 'section': 'Section::::Abstract.'}]}]