Question: when did the tv show to tell the truth begin
[{'answer': 'December 18 , 1956', 'provenance': [{'wikipedia_id': '469794', 'title': 'To Tell the Truth', 'start_paragraph_id': 10, 'start_character': 54, 'end_paragraph_id': 10, 'end_character': 72, 'bleu_score': 1.0, 'section': 'Section::::History.:1956–1968, CBS.\n'}]}]