Question: when did the mercedes c class come out
[{'answer': '1993', 'provenance': [{'wikipedia_id': '409837', 'title': 'Mercedes-Benz C-Class', 'start_paragraph_id': 1, 'start_character': 100, 'end_paragraph_id': 1, 'end_character': 104, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '409837', 'title': 'Mercedes-Benz C-Class', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 734, 'bleu_score': 0.8967155524297281, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1924719186787968702}, 'section': 'Section::::Abstract.'}]}]