Question: when did the first episode of glee air
[{'answer': 'May 19 , 2009', 'provenance': [{'wikipedia_id': '25668962', 'title': 'Glee (season 1)', 'start_paragraph_id': 9, 'start_character': 62, 'end_paragraph_id': 9, 'end_character': 75, 'bleu_score': 1.0, 'section': 'Section::::Production.\n'}]}, {'provenance': [{'wikipedia_id': '25668962', 'title': 'Glee (season 1)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 586, 'bleu_score': 0.9563334828258161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7666826720530898819}, 'section': 'Section::::Abstract.'}]}]