Question: when did lays sour cream and onion chips come out
[{'answer': 'the late 1970s', 'provenance': [{'wikipedia_id': '1546514', 'title': "Lay's", 'start_paragraph_id': 32, 'start_character': 201, 'end_paragraph_id': 32, 'end_character': 215, 'bleu_score': 1.0, 'section': 'Section::::Flavors.:North America.:United States.\n'}]}, {'provenance': [{'wikipedia_id': '1546514', 'title': "Lay's", 'start_paragraph_id': 32, 'start_character': 0, 'end_paragraph_id': 32, 'end_character': 215, 'bleu_score': 0.9451524926983921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1944153319893428593}, 'section': 'Section::::Flavors.:North America.:United States.\n'}]}]