Question: when was high fructose corn syrup first used
[{'answer': 'early 1970s', 'provenance': [{'wikipedia_id': '2366752', 'title': 'High-fructose corn syrup', 'start_paragraph_id': 1, 'start_character': 390, 'end_paragraph_id': 1, 'end_character': 401, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2366752', 'title': 'High-fructose corn syrup', 'start_paragraph_id': 1, 'start_character': 54, 'end_paragraph_id': 1, 'end_character': 552, 'bleu_score': 0.6739041974801251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5196276224318059591}, 'section': 'Section::::Abstract.'}]}]