Question: which aspect of the roman catholic church established in the 300s remains today quizlet
[{'answer': 'The doctrine of the Trinity', 'provenance': [{'wikipedia_id': '9523738', 'title': 'History of Christian theology', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 27, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '9523738', 'title': 'History of Christian theology', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 486, 'bleu_score': 0.9748377259086851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16106535311015631123}, 'section': 'Section::::Abstract.'}]}]