Question: when did captain kangaroo go off the air
[{'answer': 'December 8 , 1984', 'provenance': [{'wikipedia_id': '54588', 'title': 'Captain Kangaroo', 'start_paragraph_id': 1, 'start_character': 156, 'end_paragraph_id': 1, 'end_character': 173, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '54588', 'title': 'Captain Kangaroo', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 478, 'bleu_score': 0.883295395931827, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3380808407998600906}, 'section': 'Section::::Abstract.'}]}]