Question: where did the polar bear dip originate in canada
[{'answer': '1920', 'provenance': [{'wikipedia_id': '15989269', 'title': 'Polar bear plunge', 'start_paragraph_id': 3, 'start_character': 192, 'end_paragraph_id': 3, 'end_character': 196, 'bleu_score': 1.0, 'section': 'Section::::Canada.\n'}]}, {'provenance': [{'wikipedia_id': '15989269', 'title': 'Polar bear plunge', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 600, 'bleu_score': 0.979896933041101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15758626112970718092}, 'section': 'Section::::Canada.\n'}]}]