Question: A brand that is formerly known as Tricon Global Restaurants, Inc., operates what restaurant chain that had over 15,000 locations worldwide as of 2015?

Context paragraphs:
Chefette: Chefette Restaurants is the largest fast food restaurant chain based in the Caribbean island nation of Barbados.  Currently operating throughout the island in 14 locations, Chefette is known for its broasted chicken meals as well as a local curried-'meat + vegetable' (similar to the European Gyro) roll-up or wrap, locally known as a roti.  Chefette was founded by a Trinidadian businessman named Assad John Haloute, who migrated to Barbados in 1971.  In 1972, he opened the first Chefette Restaurant at Fontabelle, St. Michael.  As the success of the chain grew over the next three decades, the restaurant chain continued its expansion.  The company's trademark colours are yellow and purple.

Pizza Hut: Pizza Hut is an American restaurant chain and international franchise founded in 1958 by Dan and Frank Carney.  The company is known for its Italian-American cuisine menu including pizza and pasta, as well as side dishes and desserts.  Pizza Hut has over 15,000 locations worldwide as of 2015, and is a subsidiary of Yum!  Brands, Inc., one of the world's largest restaurant companies.

Jim's Restaurants: Jim's Restaurants is an American chain of restaurants owned by Uptown San Antonio, Texas-based Frontier Enterprises.  Jim's, best known for its breakfast and charbroiled Frontier Burgers, was started in 1947 when founder G. Jim Hasslocher built his first burger stand.  The burger stand grew and became a drive-in burger concept with carhops, which eventually led to full-service restaurants in several locations.  Prior to 1980, the restaurant chain expanded into the Houston, TX metro area until Frontier withdrew and sold off the Houston locations.  As of April 2010, Frontier operates 16 locations in the San Antonio area and 3 in Austin.

VIP's: VIP's, alternatively written Vip's, is a defunct restaurant chain in the Western United States that operated from 1968 until the late 1980s, based in Salem, Oregon.  With more than 50 locations, it was once the largest restaurant chain based in Oregon.  It was a Denny's-style restaurant, a type that was commonly known at that time as a "coffee shop" but is now more commonly known as a casual dining restaurant.  Most restaurants were located near freeways and were open 24 hours.  At its peak, the chain had locations in five states: Oregon, Washington, Idaho, Nevada and northern California.

Panda Express: Panda Express is a fast casual restaurant chain which serves American Chinese cuisine.  It is the largest Asian segment restaurant chain in the United States, where it was founded and is mainly located (in addition to other countries and territories in North America and Asia).  Panda Express restaurants were traditionally located in shopping mall food courts, but the chain now operates units in many other environments and formats, including stand-alone restaurants, as well as universities, casinos, airports, military bases, amusement parks and other venues.

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.

Wingstop: Wingstop Restaurants, Inc. is a chain of nostalgic, aviation-themed restaurants where the sole focus is on chicken wings.  Wingstop locations are decorated following a 1930s and 1940s "pre-jet" aviation theme.  The restaurant chain was founded in 1994 in Garland, Texas, and began offering franchises in 1998.  Since then, Wingstop has grown into a chain with more than 1,000 restaurants either open or in development.  The chain is headquartered in Dallas, Texas.

McCormick &amp; Schmick's: McCormick & Schmick's Seafood Restaurants Inc. is an American seafood restaurant chain, based in Portland, Oregon.  As of October 2016, the company operates 72 locations in North America under various brands, including 60 restaurants across 22 U.S. states, as well as 12 Canadian locations that operate under the Boathouse name.  A sale to the parent company, Landry's, Inc., was completed in January 2012.

Red Lobster: Red Lobster Hospitality LLC is an American casual dining restaurant chain headquartered in Orlando, Florida.  The company has operations in Canada, Malaysia, Saudi Arabia, the United Arab Emirates, Qatar, Mexico, and Japan, in addition to the United States.  As of February 24, 2013, the company had 705 locations worldwide.  Golden Gate Capital has been Red Lobster's parent company since it was acquired from Darden Restaurants on July 28, 2014.

Freebirds World Burrito: Freebirds World Burrito, Freebirds for short, is a regional chain of fast casual burrito restaurants founded in 1987 in Santa Barbara, California, USA.  by Mark Orfalea.  The restaurant chain expanded into Texas in 1990 under Orfalea's leadership.  In 1994 Mark's college friend and manager of the Texas location, Pierre Dube, purchased control of the restaurant and gradually expanded the chain to span 19 restaurants in Texas.  Orfalea retained ownership of the original California location and a license to continue using the name in California.  The Texas Freebirds World Burrito chain, which was headquartered in College Station, was purchased by private-equity Tavistock Group in 2007.  The chain, headquartered in the Tavistock Restaurants offices in Emeryville, California, has grown to over 60 locations in Texas, 5 locations in Utah and others scattered throughout states of Kansas, Missouri, Oklahoma, Louisiana, and Tennessee.

Supporting paragraphs: Yum! Brands Pizza Hut
Answer: Pizza Hut