Question: what was the first year of the datsun 280z
[{'answer': 'the 1975 model year', 'provenance': [{'wikipedia_id': '1042154', 'title': 'Nissan S30', 'start_paragraph_id': 74, 'start_character': 71, 'end_paragraph_id': 74, 'end_character': 90, 'bleu_score': 1.0, 'section': 'Section::::280Z.\n'}]}, {'provenance': [{'wikipedia_id': '1042154', 'title': 'Nissan S30', 'start_paragraph_id': 74, 'start_character': 0, 'end_paragraph_id': 74, 'end_character': 381, 'bleu_score': 0.9338603241255111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3880819217485808669}, 'section': 'Section::::280Z.\n'}]}]