Question: ambassador extraordinary and plenipotentiary of the united states of america to the holy see
[{'answer': 'Callista Gingrich', 'provenance': [{'wikipedia_id': '3159442', 'title': 'List of ambassadors of the United States to the Holy See', 'start_paragraph_id': 3, 'start_character': 401, 'end_paragraph_id': 3, 'end_character': 418, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]