Question: when did the clangers first appear on tv
[{'answer': '1969', 'provenance': [{'wikipedia_id': '31454', 'title': 'Clangers', 'start_paragraph_id': 1, 'start_character': 359, 'end_paragraph_id': 1, 'end_character': 363, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31454', 'title': 'Clangers', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 431, 'bleu_score': 0.8130319850412631, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15359978476506899753}, 'section': 'Section::::Abstract.'}]}]