Question: when did nacho cheese doritos first come out
[{'answer': '1972', 'provenance': [{'wikipedia_id': '165365', 'title': 'Doritos', 'start_paragraph_id': 18, 'start_character': 572, 'end_paragraph_id': 18, 'end_character': 576, 'bleu_score': 1.0, 'section': 'Section::::Flavors.\n'}]}, {'provenance': [{'wikipedia_id': '165365', 'title': 'Doritos', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 1055, 'bleu_score': 0.9742954329635831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17971002575754269924}, 'section': 'Section::::Flavors.\n'}]}]