Question: Simmons Bedding Company is the sister company of the mattress manufacturer based in what city?

full_context: Document 1: Sears Hometown and Outlet Stores: Sears Hometown and Outlet Stores Inc. is an American retail company that sells home appliances, lawn and garden equipment, apparel, mattresses, sporting goods and tools. The company has four subsidiary store formats: Sears Hometown, Sears Outlet, Sears Hardware and Appliance, and Sears Home Appliance Showrooms. Sears Hometown and Outlet Stores is based in Hoffman Estates, Illinois. Sears Hometown and Outlet Stores was founded on April 23, 2012. The company was spun off from Sears Holdings in 2012.
Document 2: American Home Shield: American Home Shield Corporation is an American home warranty company and a unit of ServiceMaster. American Home Shield was founded in 1971 and operated independently until it was acquired by ServiceMaster in 1989. It serves 1.4 million customers across 49 states and the District of Columbia. It functions as one of ServiceMaster’s “family of brands”, along with Terminix, Furniture Medic, AmeriSpec, ServiceMaster Clean, ServiceMaster Restore, and Merry Maids. It is one of a few home warranty companies with active operations in all 48 contiguous states.
Document 3: Serta (company): Serta is an American company based in Hoffman Estates, Illinois that specializes in developing and manufacturing mattresses. It was founded in 1931 in Illinois as Sleeper, Inc. by 13 mattress manufacturers who licensed the Serta name; subsequently eight independent licensees acting like a cooperative owned the company. Afterwards, it was controlled and operated as Serta International by its largest licensee, National Bedding Company, (which ultimately held 27 of the 34 U.S. Serta manufacturing licenses). In 2005, two private equity groups teamed up to purchase National Bedding Co.--The Ares Corporate Opportunities Fund, the Los Angeles-based private equity fund of Ares Management; and Teachers’ Private Capital, the private equity arm of the Ontario (Canada) Teachers’ Pension Plan. The American company Serta International is a subsidiary of the American company Serta Simmons Holdings LLC.
Document 4: Dale Carlsen: Dale R. Carlsen founded The Sleep Train Mattress Center in 1985, and has guided the company to become the largest retailer of mattresses on the West Coast, and one of the top three in the United States. In 2002, Dale purchased 54 of Mattress Discounters' stores in California during that company's bankruptcy—more than doubling Sleep Train's size. In August 2006, Dale purchased Sleep Country USA from Simmons Bedding in a move to re-enter the northwestern market.
Document 5: Sears Canada: Sears Canada is a Canadian retail chain headquartered in Toronto, Ontario. The company's roots are in Simpsons-Sears, a joint venture with the Simpsons retail chain and the U.S. Sears chain, which operated a national mail order business, and co-branded Simpsons-Sears stores modelled after the U.S. Sears chain. Following the purchase of Simpsons by the Hudson's Bay Company in 1978, the joint venture was dismantled, and the Simpsons-Sears stores became solely owned by Sears. In 1999, Sears Canada acquired the remaining assets and locations of the historic Canadian chain Eaton's. Sears Holdings now owns a 10% share in the company. ESL Investments is the largest shareholder of Sears Canada.
Document 6: Sears: Sears, short name for Sears, Roebuck & Company, is an American chain of department stores founded by Richard Warren Sears and Alvah Curtis Roebuck in 1886. Formerly based at the Sears Tower in Chicago and currently headquartered in Hoffman Estates, Illinois, it began as a mail ordering catalog company and began opening retail locations in 1925. The company was bought by the American big box chain Kmart in 2005, which renamed itself Sears Holdings upon completion of the merger. In terms of domestic revenue, Sears was the largest retailer in the United States until October 1989, when Walmart surpassed the record. It is currently the fifth-largest American department store company by sales as of October 2013 (behind Walmart, Target, Best Buy, and The Home Depot), and the twelfth-largest retailer in the country overall. Sears operates divisions in Canada and Mexico, as well as several other subsidiaries within its brand.
Document 7: Sunday Mattress: Sunday is a sleep focussed start-up in India founded by Alphonse Reddy, – who is also the founder of Fabmart.com, a retail venture that sells premium sleep products – in September 2015. Sunday mattresses are manufactured and retailed by MRPL (Madanapalle Retail Private Ltd). Sunday sources its raw materials from four different countries, including Belgium. The mattresses have been designed by Japanese designer Hiroko Shiratori, who is the founding member of London based design collective OKAY studio. Apart from selling online through its website, the company also retails in Bangalore. The company sells two mattress variants — Ortho plus and Latex Plus, and follows omni-channel sales strategy. Its online sales are augmented by an experience centre in Bangalore. Sunday like other sleep start-ups follows a 100 Nights Trial offer, where customers can return the product and get a full refund if they are not satisfied with the purchase. The product range includes mattresses, pillows, toppers and protector pads. Sunday offers value additions such as same day delivery & Try’N’Pay in Bangalore and Hyderabad. Sunday mattress is one of the best options in the mid and premium range. Sunday is funded by Anand Morzaria, entrepreneur in the ITES space, and his team.
Document 8: Chittenden &amp; Eastman Company: Chittenden & Eastman Company (established in 1866) is an American handcrafting mattress manufacturer originally based in Burlington, Iowa. The company has thirty factories around the world and is currently headquartered in North Brunswick, New Jersey. Chittenden & Eastman's intellectual property has since been purchased by Mattress Development Company of Delaware which reintroduced the Eastman House brand into the marketplace. The company is active with over 30 factories and licensees worldwide.
Document 9: Mattress Giant: Mattress Giant Corporation was an American retailing company and mattress store chain founded in 1986 in Miami, Florida. The company was based in Addison, Texas. In 2012 it was announced Mattress Firm would acquire all Mattress Giant locations in the U.S in a $47 million deal, virtually all Mattress Giant locations will convert to Mattress Firm. Some stores were converted to Sleepy's which were later converted to Mattress Firm. The deal closed in July 2012 and it effectively ended Mattress Giant's presence as a bedding retailer. The website was operated through December 2012; and it delivered mattress related products to houses.
Document 10: Sears Holdings: The Sears Holdings Corporation is an American holding company headquartered in Hoffman Estates, Illinois, a suburb of Chicago. It is the owner of retail store brands Sears and Kmart, and was founded after the latter purchased the former in 2005. Sears Holdings also owns the brands Kenmore and DieHard. A sale of Craftsman to Stanley Black and Decker occurred in March of 2017. Sears retains the rights to sell Craftsman tools for 15 years from the date of sale through the purchase of tools from their established suppliers. Sears Holdings operates 1,503 retail locations under the mastheads of Sears, Kmart, and their subsidiaries, such as auto centers and pharmacies, in all 50 states, Puerto Rico, and Guam. As of 2014, it is the 18th-largest retailing company in the United States.
Document 11: Mattel: Mattel, Inc. ( ) is an American multinational toy manufacturing company founded in 1945 with headquarters in El Segundo, California. In 2014, it ranked #403 on the Fortune 500 list. The products and brands it produces include Fisher-Price, Barbie dolls, Monster High dolls, Ever After High dolls, Winx Club dolls, Hot Wheels and Matchbox toys, Masters of the Universe toys, American Girl dolls, board games, and WWE toys. In the early 1980's, Mattel produced video game systems, under its own brands and under license from Nintendo. The company has presence in 40 countries and territories and sells products in more than 150 nations. The company operates through three business segments: North America, international, and American Girl. It is the world's largest toy maker in terms of revenue. On January 17, 2017, Mattel named Google executive Margo Georgiadis as its next CEO.
Document 12: Kmart: Kmart is an American big box department store chain headquartered in Hoffman Estates, Illinois, United States. The chain purchased Sears for $11 billion in 2005, forming a new corporation under the name Sears Holdings Corporation. The Kmart name was incorporated in 1916 while the first store didn't open its doors until 1962. At its peak in 2000, Kmart operated 2,171 stores including 105 Super Kmart Center locations. For the 2005 fiscal year under the new company, the Kmart store count was at 1,416 with only 55 Super Kmart Center locations. Currently, the chain is operating 624 stores with only 1 Super Kmart Center location remaining (Store #4939 in Warren, OH). This number is the amount of stores that still exist after the closings that took place during the first quarter of 2017.
Document 13: Simmons Bedding Company: The Simmons Bedding Company is an American major manufacturer of mattresses and related bedding products, based in Atlanta, Georgia. The company was founded in 1870, and is one of the oldest companies of its kind in the United States. Simmons' flagship brand is "Beautyrest". In addition to operating 18 manufacturing facilities in the United States and Puerto Rico, the company licenses its products internationally. According to a Simmons press release, net sales for 2005 were $855 million, and its revenue was $1.13 billion in 2007 and $1.228 billion in 2013. As of 2011, Simmons ranked in third place among U.S. mattress manufacturers, with a 15.7 percent market share. In 2012, Simmons and its sister company Serta International were acquired by American private equity company Advent International.
Document 14: Sleeper Mattresses and Bedding Company: Sleeper Mattresses and Bedding Company is one of the top 100 companies in the Middle East. Sleeper (a Branch of Al-Rajhi Industrial Group) was established in 1980 and is located in the industrial area of Al-Kharj Road, Riyadh, Kingdom of Saudi Arabia (K.S.A). Sleeper Mattress and Bedding Company is the member of International Sleep Products Association (ISPA) and is authorized by I.S.O-9001-2000. Certificate No. 545178
Document 15: Protect-A-Bed: Protect-A-Bed® is a manufacturer and distributor of protective bedding products(including mattress protectors and encasements) that help protect against bed bugs, dust and allergens. Protect-A-Bed products are available in 45 countries. Protect-A-Bed supplies mattress and pillow protectors to 7 of the 11 top bedding specialists in the United States, several of the top 100 U.S. furniture chains, and all the major distributors in the pest control industry and hospitality industry. Protect-A-Bed products are also sold by national retailers including J.C. Penney, Target, Kohl’s, Costco, and Sears. The company currently has in excess of 7,000 furniture and bedding store clients in the United States as well as serving pest control and hospitality markets with bedding protection products. Protect-A-Bed is the developer of Miracle Membrane®, a proprietary membrane, which is waterproof and protects against liquids, as well as the patented BugLock® with SecureSeal® and three-sided zipper system for encasements. Protect-A-Bed products are listed as Class 1 Medical Devices with the Food and Drug Administration, and have received the Good Housekeeping Seal.
ground_truth: Hoffman Estates, Illinois