Question: when did olly murs appear in x factor
[{'answer': 'the sixth series', 'provenance': [{'wikipedia_id': '24594902', 'title': 'Olly Murs', 'start_paragraph_id': 1, 'start_character': 144, 'end_paragraph_id': 1, 'end_character': 160, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '24594902', 'title': 'Olly Murs', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 308, 'bleu_score': 0.814745301304837, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12401265448926933959}, 'section': 'Section::::Abstract.'}]}]