Question: who was the only roman catholic ever elected president
[{'answer': 'John F. Kennedy', 'provenance': [{'wikipedia_id': '24115', 'title': 'Religious affiliations of Presidents of the United States', 'start_paragraph_id': 2, 'start_character': 541, 'end_paragraph_id': 2, 'end_character': 556, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '24115', 'title': 'Religious affiliations of Presidents of the United States', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 730, 'bleu_score': 0.711648698500918, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10460259319971223305}, 'section': 'Section::::Abstract.'}]}]