Question: When did the manufacturer of Tava change from sugar to corn syrup?

full_context: Document 1: Teem: Teem is a lemon-lime-flavored soft drink produced by The Pepsi-Cola Company. It was introduced in 1960 as Pepsi's answer to 7 Up and Coca-Cola's Sprite.
Document 2: Baghdad Soft Drinks Co: PepsiCo International's franchise agreement authorises Baghdad Soft Drinks Company to produce and distribute PepsiCo's Pepsi-Cola, Seven-Up and Mirinda soft drink brands.
Document 3: Coca-Cola: Coca - Cola, or Coke, is a carbonated soft drink produced by The Coca - Cola Company. Originally intended as a patent medicine, it was invented in the late 19th century by John Pemberton and was bought out by businessman Asa Griggs Candler, whose marketing tactics led Coca - Cola to its dominance of the world soft - drink market throughout the 20th century. The drink's name refers to two of its original ingredients, which were kola nuts (a source of caffeine) and coca leaves. The current formula of Coca - Cola remains a trade secret, although a variety of reported recipes and experimental recreations have been published.
Document 4: Diet drink: The beginning of the diet drink or refreshment era was in 1952, when Kirsch Bottling in Brooklyn, New York launched a sugar - free ginger ale called No - Cal. It was designed for diabetics, not dieters, and distribution remained local. Royal Crown Cola placed an announcement in an Atlanta newspaper in 1958 announcing a diet product, Diet Rite. In 1962, Dr Pepper released a diet (etic) version of its soft drink, although it sold slowly due to the misconception that it was meant solely for diabetic consumption. In 1963, The Coca - Cola Company joined the diet soft drink market with Tab, which proved to be a huge success. Tab was originally sweetened with cyclamates and saccharin.
Document 5: New Coke: New Coke was the unofficial name for the reformulation of Coca - Cola introduced in April 1985 by the Coca - Cola Company to replace the original formula of its flagship soft drink Coca - Cola (also called Coke). In 1992, it was named Coke II.
Document 6: Virgin Drinks: After thirteen years, the brand started to massively decline as rival Coca-Cola had made exclusive distribution deals in big stores and restaurants. This led to Virgin only being sold in select supermarkets and local stores. Virgin Group decided it could not compete with cola rivals. In 2007, Virgin Drinks sold over the rights of Virgin Cola to a company called Silver Spring Soft Drinks. Virgin Vodka was discontinued when Virgin Drinks failed to find a buyer. Virgin Drinks were made defunct in 2007.
Document 7: Manzanita Sol: Manzanita Sol is a brand of apple-flavored soft drinks owned by PepsiCo and is predominant in Mexico. In the United States it is sold in 12-pack cans, 2-liter, and 20-ounce bottles. The drink is known to be available at Walmart, Albertsons, H-E-B, Ralphs, Kmart, Food 4 Less, Jewel-Osco, Dominick's, Target, Vons, Stater Bros., United Supermarkets in the Amarillo and Lubbock, Texas area, and other smaller chains and smaller family run stores. In Latin American countries, Manzanita Sol will compete with The Coca-Cola Company's Manzana Lift. Manzanita Sol is PepsiCo's number two brand in Mexico, with apple being Mexico's second most popular soft drink flavor. It is also very popular in the borderlands such as the El Paso/Juarez border.
Document 8: Josta: Josta was a soft drink brand that was produced by PepsiCo and the first energy drink ever introduced by a major US beverage company. Josta's flavor has been described as predominantly fruity, with a hint of spice and a touch of the key ingredient guaraná. It was marketed as a "high-energy drink" with guaraná and caffeine.
Document 9: Kas: Kas is the brand name of soft drink produced by PepsiCo. It is made in grapefruit, orange (yellow), lemon (greenish-yellow), bitter (herbal extracts), and apple flavors. Kasfruit juices are also offered in multiple flavors. Kas is available in Spain, Mexico and France, and was available in Portugal, Brazil and Argentina during the 1990s.
Document 10: Izze: Izze (pronounced iz-ee) is the brand name of a line of carbonated juice drinks produced by the IZZE Beverage Company in Boulder, Colorado, which is owned by PepsiCo. The drinks consist of 70% fruit juice from concentrate, and 30% seltzer water. Izze does not contain added preservatives.
Document 11: Pepsi-Cola Made with Real Sugar: The Pepsi - Cola Made with Real Sugar, formerly called Throwback, is a brand of soft drink sold by PepsiCo in the United States and in sweet stores in South Australia for its flagship Pepsi and Mountain Dew brands. The drinks, called Pepsi Throwback and Mountain Dew Throwback, are named as such because they are flavored with cane sugar and beet sugar instead of high fructose corn syrup, which soft drink companies used to replace sugar (in their North American products) in the 1980s. In addition, these drinks use retro packaging. As of June 2014, Pepsi Throwback has been replaced in one area of the United States by ``Pepsi - Cola Made with Real Sugar '', a new product formulation, also made without high fructose corn syrup.
Document 12: Tava (soft drink): Tava was a carbonated beverage fortified with vitamins and minerals, released by PepsiCo in the first half of 2008. It was marketed exclusively on the web.
Document 13: Aspen Soda: Aspen Soda was an apple-flavored soft drink sold across the United States by PepsiCo from 1978 until 1982. In 1984, PepsiCo came out with a replacement apple soda under its new Slice line.
Document 14: AdeS: AdeS is a brand of drinking water available in Indonesia. The mineral water is also known as I-Lohas in Japan. The Coca-Cola Company acquired the Ades bottled water brand for $20 million in 2000 as part of its $45 million investment in the country since 1999 under PT Akasha Wira International Tbk. It is currently made by PT Coca-Cola Bottling Indonesia in Bekasi, West Java, where it also made Coca-Cola, Fanta and Sprite.
Document 15: Coca-Cola: Coca - Cola Type Cola Manufacturer The Coca - Cola Company Country of origin United States Introduced May 8, 1886; 132 years ago (1886 - 05 - 08) Color Caramel E-150d Flavor Cola Variants Diet Coke Diet Coke Caffeine - Free Caffeine - Free Coca - Cola Coca - Cola Zero Sugar Coca - Cola Cherry Coca - Cola Vanilla Coca - Cola Citra Coca - Cola Life Related products Pepsi RC Cola Afri - Cola Postobón Inca Kola Kola Real Cavan Cola Website www.coca-colacompany.com
ground_truth: the 1980s
sub_queries: Tava >> manufacturer Answer: Pepsi
when did Pepsi change from sugar to corn syrup Answer: the 1980s