Question: when did the first diet soda come out
[{'answer': '1952', 'provenance': [{'wikipedia_id': '581712', 'title': 'Diet drink', 'start_paragraph_id': 3, 'start_character': 43, 'end_paragraph_id': 3, 'end_character': 47, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '581712', 'title': 'Diet drink', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 663, 'bleu_score': 0.9216635569666731, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3584084863026710968}, 'section': 'Section::::History.\n'}]}]