Question: WMS Gaming is part of a company that is a subsidiary of which American gambling products company?

Context paragraphs:
Betsson: Betsson Group (Betsson AB) is a Swedish company that offers a number of online gambling products, such as casino, poker, bingo, sports betting and scratch cards through more than 20 online gaming brands including Betsson, Betsafe and NordicBet.  Betsson AB is listed on the NASDAQ Stockholm Large Cap List.

The Collins Companies: Collins, began operations July 28, 1855, is a family-owned American forest products company.  Headquartered in Portland, Oregon, Collins was the first privately owned forest products company in the United States to have all of its hardwood and softwood forests certified by the Forest Stewardship Council (FSC).  In addition to its forests and sawmills, Collins also: Manufactures siding and trim, particleboard, hardwood, and softwood lumber, and operates retail hardware and lumber yards in northern California.  Divisions include: Collins Pine Company, Kane Hardwood, Collins Hardwood LLC, Collins Products LLC, Collins Builders Supply, and the Almanor Railroad.

John Popadiuk: John A. Popadiuk, Jr. (born 1962) also known as JPop, was a pinball machine designer, who started work in the business at 19 for Bally in 1980, and later at WMS Gaming from 1989-2000.

Scientific Games Corporation: Scientific Games Corporation is an American company that provides gambling products and services to lottery and gambling organizations worldwide.  The company is headquartered in Las Vegas, Nevada.  Products include electronic gaming machines, table games, iGaming and iLottery products, instant lottery games, lottery gaming systems, terminals and services, internet applications, server-based interactive gambling terminals, and gambling control systems.

Tecumseh Products: Tecumseh Products Company is an American manufacturer of hermetic compressors for air conditioning and refrigeration products.  Tecumseh Products Company has subsidiaries that sell externally and internally to Tecumseh.  The Tecumseh corporate offices are located in Ann Arbor, Michigan.

WMS Gaming: WMS Gaming is a manufacturer of slot machines, video lottery terminals and software to help casinos manage their gaming operations.  It also offers online and mobile games.  The company is based in Chicago, Illinois.  WMS is a subsidiary of WMS Industries, which became a wholly owned subsidiary of Scientific Games Corporation in 2013.

Stora Enso: Stora Enso Oyj (Swedish: ' [stuːra] and Finnish: ' [enso]) is a pulp and paper manufacturer headquartered in Helsinki, Finland, with significant operations in four continents.  The company was formed by the merger of Swedish mining and forestry products company Stora AB and Finnish forestry products company Enso Oyj in 1998.  It has approximately 25,000 employees (2016).  For 2014, Stora Enso was ranked fifth in the world by sales, among forest, paper and packaging industry companies.  The first share of the company dates back to 1288, and it is claimed that Stora Enso is thus the oldest limited liability company in the world.

North American gambling treatment centers: North American gambling treatment centers are intended to treat gambling addiction.  In general, gambling addiction treatment is considered an add-on to other addiction treatments.  All three treatment centers that offer gambling addiction treatment in North America treat gambling in addition to alcohol addiction and other substances addictions.

Firestone Diversified Products: Firestone Diversified Products, LLC is an umbrella company that houses Firestone Building Products, Firestone Specialty Products, Firestone Industrial Products Company, and Firestone Natural Rubber Company.  The non-tire arm of Firestone Tire and Rubber Company, a subsidiary of Bridgestone, Firestone Diversified Products is headquartered in Indianapolis, Indiana and operates in 23 U.S. states as well as 10 countries worldwide.  The company reports annual sales of $2.5 billion.

WMS Industries: WMS Industries, Inc. is an American electronic gaming and amusement manufacturer in Enterprise, Nevada.  WMS traces its roots to 1943, to the Williams Manufacturing Company, founded by Harry E. Williams.  However, the company that became WMS Industries was formally founded in 1974 as Williams Electronics, Inc.

Supporting paragraphs: WMS Gaming Scientific Games Corporation
Answer: Scientific Games Corporation