Question: when did the detroit red wings octopus tradition begin
[{'answer': 'April 15 , 1952', 'provenance': [{'wikipedia_id': '4759267', 'title': 'Legend of the Octopus', 'start_paragraph_id': 1, 'start_character': 438, 'end_paragraph_id': 1, 'end_character': 453, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4759267', 'title': 'Legend of the Octopus', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 689, 'bleu_score': 0.9073286468096761, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6257120843100760115}, 'section': 'Section::::Abstract.'}]}]