Question: when did the carol burnett 50th anniversary show first air
[{'answer': 'December 3 , 2017'}, {'provenance': [{'wikipedia_id': '448115', 'title': 'The Carol Burnett Show', 'start_paragraph_id': 70, 'start_character': 0, 'end_paragraph_id': 70, 'end_character': 254, 'bleu_score': 0.5459375743191931, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14359070978741945865}, 'section': 'Section::::After the series.:Specials.\n'}]}]