Question: who reigned when christianity was adopted as the official religion of the roman empire
[{'answer': 'Roman Emperor Constantine the Great', 'provenance': [{'wikipedia_id': '2352987', 'title': 'Constantine the Great and Christianity', 'start_paragraph_id': 1, 'start_character': 24, 'end_paragraph_id': 1, 'end_character': 59, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2352987', 'title': 'Constantine the Great and Christianity', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 552, 'bleu_score': 0.586396619373282, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4129929486444060324}, 'section': 'Section::::Abstract.'}]}]