Question: when did the 5d mark iv come out
[{'answer': 'September 2016', 'provenance': [{'wikipedia_id': '51414632', 'title': 'Canon EOS 5D Mark IV', 'start_paragraph_id': 2, 'start_character': 96, 'end_paragraph_id': 2, 'end_character': 110, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '51414632', 'title': 'Canon EOS 5D Mark IV', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 196, 'bleu_score': 0.9517713210466091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2353666230284731276}, 'section': 'Section::::Abstract.'}]}]