Question: when did the day after thanksgiving become black friday
[{'answer': '1952', 'provenance': [{'wikipedia_id': '366477', 'title': 'Black Friday (shopping)', 'start_paragraph_id': 1, 'start_character': 260, 'end_paragraph_id': 1, 'end_character': 264, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '366477', 'title': 'Black Friday (shopping)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 264, 'bleu_score': 0.617367948929471, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10762118858250530286}, 'section': 'Section::::Abstract.'}]}]