Question: when was the first indian residential school opened in canada
[{'answer': 'in the 1840s'}, {'provenance': [{'wikipedia_id': '9211329', 'title': 'List of Indian residential schools in Canada', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 159, 'bleu_score': 0.6744322250214191, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4843801828152388787}, 'section': 'Section::::Abstract.'}]}]