Question: when did the canon 7d mark ii come out
[{'answer': 'September 15 , 2014', 'provenance': [{'wikipedia_id': '43829699', 'title': 'Canon EOS 7D Mark II', 'start_paragraph_id': 1, 'start_character': 112, 'end_paragraph_id': 1, 'end_character': 135, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '43829699', 'title': 'Canon EOS 7D Mark II', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 532, 'bleu_score': 0.905139679888961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3834443048023128164}, 'section': 'Section::::Abstract.'}]}]