Question: when did the ottawa rough riders become the ottawa redblacks
[{'answer': 'June 8 , 2013', 'provenance': [{'wikipedia_id': '16627032', 'title': 'Ottawa Redblacks', 'start_paragraph_id': 24, 'start_character': 220, 'end_paragraph_id': 24, 'end_character': 233, 'bleu_score': 1.0, 'section': 'Section::::Team name.\n'}]}, {'provenance': [{'wikipedia_id': '16627032', 'title': 'Ottawa Redblacks', 'start_paragraph_id': 24, 'start_character': 0, 'end_paragraph_id': 24, 'end_character': 527, 'bleu_score': 0.857218819956387, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13533701209992932108}, 'section': 'Section::::Team name.\n'}]}]