Question: who sponsored a council of bishops which reaffirmed the nicene creed
[{'answer': 'Ephesus', 'provenance': [{'wikipedia_id': '21541', 'title': 'Nicene Creed', 'start_paragraph_id': 16, 'start_character': 293, 'end_paragraph_id': 16, 'end_character': 300, 'bleu_score': 1.0, 'section': 'Section::::History.:Niceno-Constantinopolitan Creed.\n'}]}, {'provenance': [{'wikipedia_id': '21541', 'title': 'Nicene Creed', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 789, 'bleu_score': 0.946458548545932, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8092413279842156822}, 'section': 'Section::::History.:Niceno-Constantinopolitan Creed.\n'}]}]