Question: when was the first vampire diaries episode released
[{'answer': 'September 10 , 2009', 'provenance': [{'wikipedia_id': '22823014', 'title': 'The Vampire Diaries', 'start_paragraph_id': 37, 'start_character': 48, 'end_paragraph_id': 37, 'end_character': 67, 'bleu_score': 1.0, 'section': 'Section::::Reception.:U.S. Nielsen ratings.\n'}]}, {'provenance': [{'wikipedia_id': '22823014', 'title': 'The Vampire Diaries', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 322, 'bleu_score': 0.8858241416822491, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5246876263149098295}, 'section': 'Section::::Abstract.'}]}]