Context_1 : Abu Dhabi Aviation Co. (Arabic: شركة طيران أبوظبي‎ ‎ ) () is an airline based in Abu Dhabi, United Arab Emirates. It serves oil-fields and economic facilities in the United Arab Emirates and other Arab states. Its main base is Abu Dhabi International Airport. Abu Dhabi Aviation is the largest commercial helicopter operator in the Middle East, operating 58 helicopters (15 AgustaWestland AW139s, 24 Bell 412s, 19 Bell 212s), and 3 fixed-wing aircraft (DHC-8). The company employs over 900 personnel, including 150 pilots and 340 aircraft maintenance engineers. The bulk of the company's business activity is in support of Abu Dhabi offshore oil and engineering and construction companies. Other business activities include medical evacuation, survey, photography and charter. All aerial spraying of crops in the UAE and the majority of aerial spraying in Oman is carried out by ADA. Context_2 : The Bell 212A modulation scheme defined a standard method of transmitting full-duplex asynchronous serial data at 1.2 kbit/s over analogue transmission lines. The equivalent, but incompatible ITU-T standard is V.22. Context_3 : The Thomas B. Jeffery Company was an American automobile manufacturer in Kenosha, Wisconsin from 1902 until 1916. The company manufactured the Rambler and Jeffery brand motorcars. It was preceded by the Gormully & Jeffery Manufacturing Company, a bicycle manufacturer. It was the parent company to Nash Motors, thus one of the parent companies of American Motors and Chrysler. Context_4 : Bell Helicopter is an American aerospace manufacturer headquartered in Fort Worth, Texas. A division of Textron, Bell manufactures military rotorcraft in and around Fort Worth, as well as in Amarillo, Texas, and commercial helicopters in Mirabel, Quebec, Canada. Bell provides training and support services worldwide. Context_5 : The Pratt & Whitney Canada PT6T Twin-Pac is a turboshaft engine designed for helicopters. Manufactured by Pratt & Whitney Canada, its first application was in the Bell 212 and UH-1N Twin Huey helicopter family. The PT6T Twin-Pac consists of two PT6 power turbines driving a common output reduction gearbox, producing up to 2,000 hp at 6,000 rpm. The engine is designated T400 by the U.S. military. Context_6 : Life-Like was a manufacturer of model trains and accessories that began as a division of parent company Life-Like Products, a manufacturer of extruded foam ice chests and coolers. In 1960 the company purchased the assets of the defunct Varney Scale Models and began manufacturing model trains and accessories under the name Life-Like in 1970. In 2005 the parent company, known as Lifoam Industries, LLC, chose to concentrate on their core products and sold their model railroad operations to hobby distributor Wm. K. Walthers. Today, the Life-Like trademark is used by Walthers for its line of value-priced starter train sets. Context_7 : The Bell 412 is a twin-engine utility helicopter of the Huey family manufactured by Bell Helicopter. It is a development of the Bell 212, with the major difference being the composite four-blade main rotor. Context_8 : Hainan HNA Infrastructure Investment Group Co., Ltd. formerly Hainan Island Construction Co., Ltd. is a Chinese listed company based in Haikou. in mid-2016 the company acquired HNA Infrastructure Group () in a reverse IPO from intermediate parent company HNA Infrastructure Holding Group (), which HNA Infrastructure Group is the parent company of HNA Real Estate and HNA Airport Group (, in turn HNA Airport Group is the parent company of HNA Airport Holdings (Group) () and HNA Airport Holdings is the parent company of Sanya Phoenix International Airport Co., Ltd.); HNA Airport Group is the largest shareholder of Haikou Meilan International Airport (19.58% as at October 2016), which in turn the largest shareholder of Hong Kong listed company HNA Infrastructure. In December 2016 a proposed capital increase of the HK-listed company was announced. HNA Infrastructure Investment Group would purchase a minority share directly. Haikou Meilan International Airport was the second-largest shareholder of Hainan Airlines; Hainan Airlines, however, also owned a minority stake in Haikou Meilan International Airport. Context_9 : No. 7 Helicopter Squadron is a squadron of the Sri Lanka Air Force. It currently operates Bell 212s, Bell 206s from SLAF Hingurakgoda for troop transport, MEDEVAC and training helicopter pilots. Context_10 : The Bell 212 (also known as the "Twin Two-Twelve") is a two-blade, twin-engine, medium helicopter that first flew in 1968. Originally manufactured by Bell Helicopter in Fort Worth, Texas, United States, production was moved to Mirabel, Quebec, Canada in 1988, along with all Bell commercial helicopter production after that plant opened in 1986. fact_1 :  Originally manufactured by Bell Helicopter in Fort Worth, Texas, United States, production was moved to Mirabel, Quebec, Canada in 1988, along with all Bell commercial helicopter production after that plant opened in 1986. fact_2 : Bell Helicopter is an American aerospace manufacturer headquartered in Fort Worth, Texas. fact_3 :  A division of Textron, Bell manufactures military rotorcraft in and around Fort Worth, as well as in Amarillo, Texas, and commercial helicopters in Mirabel, Quebec, Canada. Answer: Textron
Output: What is the parent company of this manufacturer that manufactured Bell 212?