Question: who legalized the practice of christianity in the roman empire
[{'answer': 'Constantine', 'provenance': [{'wikipedia_id': '2352987', 'title': 'Constantine the Great and Christianity', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 11, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2352987', 'title': 'Constantine the Great and Christianity', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 766, 'bleu_score': 0.9573008917521931, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 316784419400119636}, 'section': 'Section::::Abstract.'}]}]