Question: when did how the grinch stole christmas first air
[{'answer': 'December 18 , 1966', 'provenance': [{'wikipedia_id': '5308985', 'title': 'How the Grinch Stole Christmas! (TV special)', 'start_paragraph_id': 17, 'start_character': 3, 'end_paragraph_id': 17, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Soundtrack.\n'}]}]