Question: when did season 8 of the office air
[{'answer': 'on September 22 , 2011', 'provenance': [{'wikipedia_id': '31841130', 'title': 'The Office (American season 8)', 'start_paragraph_id': 1, 'start_character': 110, 'end_paragraph_id': 1, 'end_character': 132, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31841130', 'title': 'The Office (American season 8)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 686, 'bleu_score': 0.748786289471129, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10560427449934819232}, 'section': 'Section::::Abstract.'}]}]