Question: when did the last episode of king of the hill air
[{'answer': 'September 13 , 2009', 'provenance': [{'wikipedia_id': '26856873', 'title': 'To Sirloin with Love', 'start_paragraph_id': 1, 'start_character': 154, 'end_paragraph_id': 1, 'end_character': 173, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]