Question: when did season 2 of glee come out
[{'answer': 'September 21 , 2010', 'provenance': [{'wikipedia_id': '28043726', 'title': 'Glee (season 2)', 'start_paragraph_id': 28, 'start_character': 50, 'end_paragraph_id': 28, 'end_character': 69, 'bleu_score': 1.0, 'section': 'Section::::Reception.:Ratings.\n'}]}, {'provenance': [{'wikipedia_id': '28043726', 'title': 'Glee (season 2)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 420, 'bleu_score': 0.812700185458273, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14511324984375112667}, 'section': 'Section::::Abstract.'}]}]