Question: when did star trek air its first episode
[{'answer': 'September 8 , 1966', 'provenance': [{'wikipedia_id': '27071', 'title': 'Star Trek: The Original Series', 'start_paragraph_id': 23, 'start_character': 157, 'end_paragraph_id': 23, 'end_character': 179, 'bleu_score': 1.0, 'section': 'Section::::Production.:Season 1 (1966–1967).\n'}]}, {'provenance': [{'wikipedia_id': '27071', 'title': 'Star Trek: The Original Series', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 843, 'bleu_score': 0.9176264025807741, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6907576275568556871}, 'section': 'Section::::Abstract.'}]}]