Question: when did season 4 of glee come out
[{'answer': 'September 13 , 2012', 'provenance': [{'wikipedia_id': '35391852', 'title': 'Glee (season 4)', 'start_paragraph_id': 12, 'start_character': 275, 'end_paragraph_id': 12, 'end_character': 298, 'bleu_score': 1.0, 'section': 'Section::::Production.:Development.\n'}]}, {'answer': 'September 13 , 2012 ( 2012 - 09 - 13 ) -- May 9 , 2013'}, {'provenance': [{'wikipedia_id': '35391852', 'title': 'Glee (season 4)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 351, 'bleu_score': 0.9196822664155291, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8700875285627206762}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '35391852', 'title': 'Glee (season 4)', 'section': 'Section::::Production.:Development.\n', 'start_paragraph_id': 12, 'end_paragraph_id': 12, 'meta': {'evidence_span': ['Fox announced on May 14, 2012, that "Glee" would be moving to Thursday nights at 9\xa0pm ET for the fourth season.', 'The season premiered on September 13, 2012', "The season premiered on September 13, 2012 with the second episode of the season serving as the show's second Britney Spears tribute, featuring eight of her songs."]}}]}]