Question: Which country is the chain that owns WingStreet operated by a separate company?

Context paragraphs:
372nd Infantry Regiment (United States): The 372nd Infantry Regiment.  was an African American regiment, nominally a part of the 93rd Infantry Division (Colored), that served with the French Army in World War I.  The 372nd Infantry Regiment was composed of the First Separate Battalion of the District of Columbia organized by Charles Remond Douglass; the 9th Separate Battalion of Ohio; the First Separate Company of Maryland; Separate Company G of Tennessee; Company L, Sixth Infantry of Massachusetts; and the First Separate Company of Connecticut---all these being National Guard troops, and 250 drafted men from Camp Custer, Michigan, recruited mainly from Michigan and Wisconsin.

Howard Hughes Corporation: The Howard Hughes Corporation () is a major real estate development and management company based in Dallas, Texas.  It began as part of the oil drilling tool business founded by Howard R. Hughes, Sr., in 1913, which under his son Howard Hughes, Jr., diversified into real estate development.  The real estate operations became a separate company, which was acquired by The Rouse Company, which in turn was acquired by General Growth Properties (GGP).  In 2010, GGP formed The Howard Hughes Corporation as a separate company.

Shopko: Shopko (formerly ShopKo until June 2007) is a chain of retail stores based in Ashwaubenon, Wisconsin.  Shopko was founded in 1962 by James Ruben, and its first store opened in Green Bay.  From 1991 to 2005, the company was publicly held, with stock traded on the New York Stock Exchange under the symbol SKO.  In December 2005, the company was acquired by an affiliate of Sun Capital Partners and reverted to private ownership.  In 1999, Shopko purchased Pamida, a regional discount chain that operated mainly in smaller communities of 3,000 to 8,000 people.  Shopko operated Pamida as a separate division until 2007, when Pamida was separated from Shopko and reestablished as a separate company.  In 2012, Shopko and Pamida merged into one company.  Shortly after, most Pamida stores were rebranded as Shopko Hometown.

Hercules Inc.: Hercules, Inc., was a chemical and munitions manufacturing company based in Wilmington, Delaware, which was formed as the Hercules Powder Company.  Hercules Powder Company was formed in 1882 by DuPont and Laflin & Rand Powder Company to finance construction of a dynamite plant on land adjacent to San Francisco Bay owned by DuPont subsidiary California Powder Works.  This created the company town of Hercules, California.  Hercules Inc. was a manufacturer of chemicals and munitions based in Wilmington, Delaware.  The company was established in 1912 by T.W. Bacchus as the Hercules Powder Company.  The Hercules Powder Company was one of the companies created from the break up of the E.I. du Pont de Nemours "powder trust" in 1911 as ruled by a U.S. Supreme Court decision.  In its early years as a separate company, it continued to produce explosives and dynamite."  Hercules was spun off from DuPont as a result of U.S. federal government actions in the field of antitrusts. Hercules, Inc., operated under this name until 2008, when it was merged into Ashland Inc.

WingStreet: WingStreet is a restaurant chain specializing in chicken.  The restaurant chain is owned by Yum!  Brands, which also owns its sister franchise Pizza Hut.  As of September 2008, there were close to 1,600 locations in the U.S., Canada, and Australia.  They are almost always co-located with Pizza Hut.

Alexandria Water Company: The Alexandria Water Company (AWCO) is the water company of the city and the governorate (province) of Alexandria, Egypt.  It was founded in 1860 as a private company and it operated as such for more than 100 years before it was nationalized under the rule of Gamal Abdel Nasser.  At that time it became the Alexandria Water General Authority (AWGA), a department of Alexandria Governorate in charge of both water supply and sewerage.  In 2004, through a country-wide sector reform it became a commercially oriented company under private law.  The sewerage and wastewater treatment functions were transferred to a separate company, the Alexandria General Organization for Sanitary Drainage (AGOSD), later renamed to Alexandria Sanitary and Drainage Company (ASDCO).  The water utility became a company under private law, reverted to its old name AWCO and gained some operational independence.  Both AWCO and ASDCO are part of the government-owned Holding Company for Water and Wastewater, which owns all utilities in Egypt.  AWCO serves 4.5 million inhabitants, a number that increases to 6 million during the summer season.  The Alexandria water utility is one of the better-performing water service providers in Egypt, ranked fifth among 22 water utilities by the Egyptian Water Regulatory Authority in 2012/13.

KDK: Kawakita Denki Kigyosha (Japanese for "Kawakita Electric Company"; commonly known as KDK), is the brand name used by Matsushita Ecology Systems Co., Ltd., a separate company of the Panasonic Corporation (formerly the Matsushita Electric Industrial Group) now Panasonic Ecology Systems Co. Ltd., to manufacture the group's ventilating products.  Before becoming part of Matsushita Electric, KDK was a separate company not affiliated with Matsushita Electric Industrial Co. Ltd.  KDK was registered as a trademark in 1912 but originated in 1909 as Nippon Electric Industry Co. Ltd.

Buttrey Food &amp; Drug: Buttrey Food & Drug was a chain of grocery stores founded in Havre, Montana and formerly headquartered in Great Falls, Montana.  The company was founded in 1896 as a chain of department stores branded Buttrey Department Store.  The company opened grocery stores in 1935 and sold off its department store division following a 1966 acquisition by grocery company The Jewel Companies, Inc. Jewel was sold to American Stores in 1984 and Buttrey was sold off as separate company in 1990.  The company was sold to its main competitor, Boise, Idaho based Albertsons, in January 1998 and the Buttrey name was retired.  At that time, Buttrey was operating 44 stores in Montana, Wyoming, and North Dakota with a revenue of US$391.4 million.  As of today, most former Buttrey stores continue to operate under the Albertsons banner.

Yum! Brands: Yum!  Brands, Inc., or Yum!  and formerly Tricon Global Restaurants, Inc., is an American fast food company.  A Fortune 500 corporation, Yum!  operates the brands Taco Bell, KFC, Pizza Hut, and WingStreet worldwide, except in China, where the brands are operated by a separate company, Yum China.  Prior to 2011, Yum!  owned Long John Silver's and A&W Restaurants.

Wendy's International: Wendy's International, Inc. is the parent company of Wendy's Old Fashioned Hamburgers.  It also owned 70 percent of Cafe Express.  The Tim Hortons chain was spun off by Wendy's into a separate company in September 2006.  The Baja Fresh chain was sold in October 2006.  On September 15, 2008, the purchase of Wendy's International Inc. by Triarc Inc. was approved by shareholders.  On September 30, the merger was completed with a name change of Wendy's/Arby's Group, Inc, a change of leadership for both Arby's and Wendy's and the stock symbol changed to WEN.

Supporting paragraphs: WingStreet Yum! Brands
Answer: China