Question: when did the pope give final approval for the congregation of the christian brothers
[{'answer': '1820', 'provenance': [{'wikipedia_id': '1970484', 'title': 'Congregation of Christian Brothers', 'start_paragraph_id': 10, 'start_character': 54, 'end_paragraph_id': 10, 'end_character': 58, 'bleu_score': 1.0, 'section': 'Section::::History.:Formation.\n'}]}, {'provenance': [{'wikipedia_id': '1970484', 'title': 'Congregation of Christian Brothers', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 194, 'bleu_score': 0.9383861709333501, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17399261065072216577}, 'section': 'Section::::History.:Formation.\n'}]}]