Question: when was the first nuclear power plant built in canada
[{'answer': '1962', 'provenance': [{'wikipedia_id': '3778479', 'title': 'Nuclear power in Canada', 'start_paragraph_id': 10, 'start_character': 364, 'end_paragraph_id': 10, 'end_character': 368, 'bleu_score': 1.0, 'section': 'Section::::History.:Nuclear power plants.\n'}]}, {'provenance': [{'wikipedia_id': '3778479', 'title': 'Nuclear power in Canada', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 770, 'bleu_score': 0.983672097934538, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3897829902343688830}, 'section': 'Section::::History.:Nuclear power plants.\n'}]}]