Question: Envoy Air is a wholly owned subsidiary of an airline group that flies to how many countries worldwide?
Context: Envoy Air Inc. (formerly American Eagle Airlines) is an air carrier headquartered in Irving, Texas, in the Dallas-Fort Worth metroplex.  It is a wholly owned subsidiary of American Airlines Group that, along with several carriers outside the group, feeds the American Airlines route network under the American Eagle brand.  With over 1,800 flights a day, serving 159 cities across the United States, Canada, Mexico and the Caribbean, Envoy is considered to be the world's largest regional airline system.  Envoy is an affiliate member of the Oneworld airline alliance. The Johnsonburg, Kane, Warren and Irvine Railroad (reporting mark JKWI) was a railroad company in Pennsylvania, United States, formed on May 24, 1982, by Sloan Cornell who also owned the Knox and Kane Railroad.  The JKWI was the designated operator of the Irvine, Warren, Kane & Johnsonburg Railroad, that was a partnership of Brock Railroad (a wholly owned subsidiary of Warren Car Company), Irvine Railroad (a wholly owned subsidiary of National Forge Company) and Struthers Wells Inter-American Corporation (a subsidiary of Struthers Wells), all three being Pennsylvania corporations, and had acquired from Conrail the following railroad line segments: MP 58.52 to MP 66.7 (Irvine to Warren) and MP 92.5 to MP 111.0 (Kane to Johnsonburg). Copperweld Corp. v. Independence Tube Corp., 467 U.S. 752 (1984) , is a major US antitrust law case decided by the Supreme Court concerning the Pittsburgh firm Copperweld Corporation and the Chicago firm Independence Tube.  It that held that a parent company is incapable of conspiring with its wholly owned subsidiary for purposes of Section 1 of the Sherman Act because they cannot be considered separate economic entities.  Section 1 of the Sherman Act states that "Every contract, combination in the form of trust or otherwise, or conspiracy, in restraint of trade or commerce among the several States, or with foreign nations, is declared to be illegal."  However, for a condition of conspiracy to exist, there must be at least two parties involved.  "Copperweld" held that separate incorporation was not enough to render a parent and its subsidiary capable of conspiring, since forcibly the economic interests of a wholly owned subsidiary must be those of its parent.  It does not apply to partially owned subsidiaries. China Airlines (CAL) () () is the flag carrier and largest airline of the Republic of China (Taiwan).  It is headquartered in Taoyuan International Airport and has 12,607 regular employees.  China Airlines operates over 1,400 flights weekly to 118 airports in 115 cities (including codeshare) across Asia, Europe, North America and Oceania.  The cargo division operates 91 pure freighter flights weekly.  The carrier was, in 2013, the 29th and 10th largest airline in the world in terms of passenger revenue per kilometer (RPK) and freight RPK, respectively.  China Airlines has three airline subsidiaries: Mandarin Airlines operates flights to domestic and low-demand regional destinations; China Airlines Cargo, a member of Skyteam Cargo, operates a fleet of freighter aircraft and manages its parent airline's cargo-hold capacity; Tigerair Taiwan is a low-cost carrier established by China Airlines and Singaporean airline group Tigerair Holdings and is wholly owned by China Airlines Group. American Eagle is an American brand name for the regional branch of American Airlines, under which ten individual regional airlines operate short- and medium-haul feeder flights.  Three of these airlines, Envoy Air (formerly American Eagle Airlines), Piedmont Airlines and PSA Airlines, are wholly owned subsidiaries of American Airlines Group.  Just like the regional brands of the other two major airlines (Delta Connection and United Express), American Airlines' regional brand accounts for more than 60% of American Airlines flights. Sun Hung Kai Financial Limited (SHKFL), is a 70%-owned subsidiary of Everbright Securities Company Limited (SSE: 601788, HKEX: 6178, “Everbright Securities”).  With its foundation dating back to 1969 when Fung King Hey, Kwok Tak Seng and Lee Shau Kee teamed up to start the Sun Hung Kai partnership, SHKFL was a wholly owned subsidiary of Sun Hung Kai & Co. Limited (SEHK: 86,　“SHKCO”).  SHKCO is chaired by Lee Seng Huang and controlled by the Lee & Lee Trust following the acquisition of the Fung family’s equity interest in the company by Allied Properties (H.K.) Limited via its wholly owned subsidiary in 1996.  In June 2015, Everbright Securities acquired 70% of SHKFL from SHKCO, making SHKFL a subsidiary of Everbright Securities since then.  SHKCO remains a 30% shareholder of SHKFL. The Murrin Murrin Joint Venture is a major nickel-cobalt mining operation being conducted in the North Eastern Goldfields, approximately 45 km east of Leonora, Western Australia.  The Project was a joint venture between Murrin Murrin Holdings Pty Ltd, a wholly owned subsidiary of Minara Resources Ltd (whose share is 60%) and Glenmurrin Pty Ltd, a wholly owned subsidiary of Glencore International AG, which had a 40% share but also owned 70% of Minara.  As of November 2011, Minara Resources was fully acquired and is now wholly owned by Glencore International.  The mine opened in 1999. Cathay Pacific () () is the flag carrier of Hong Kong, with its head office and main hub located at Hong Kong International Airport.  The airline's operations and subsidiaries have scheduled passenger and cargo services to 180 destinations in 44 countries worldwide including codeshares and joint ventures.  Cathay Pacific operates a fleet of wide-body aircraft, consisting of Airbus A330, Airbus A350, and Boeing 777 equipment.  Its wholly owned subsidiary, Cathay Dragon, operates to 44 destinations in the Asia-Pacific region from its Hong Kong base.  In 2010, Cathay Pacific, together with Dragonair (rebranded Cathay Dragon), carried nearly 27 million passengers and over 1.8 million tons of cargo and mail. American Airlines Group, Inc. is an American publicly traded airline holding company headquartered in Fort Worth, Texas.  It was formed December 9, 2013, in the merger of AMR Corporation, the parent company of American Airlines, and US Airways Group, the parent company of US Airways.  The airline groups together form the largest airline in the world, with more than 6,700 daily flights to 336 locations in 56 countries worldwide, about $40 billion in operating revenue, over 100,000 employees, and plans to take delivery of 607 new aircraft, including 517 narrowbody aircraft and 90 widebody international aircraft.  The integration of American Airlines and US Airways was completed when the Federal Aviation Administration granted a single operating certificate for both carriers on April 8, 2015. Pedro Fábregas (born 12 April 1965) is an officer at American Airlines Group, the parent company of American Airlines, US Airways and Envoy Air.  Pedro Fábregas was named president and chief executive officer of Envoy Air Airlines in December 2013.  At Envoy Air, Fábregas oversees one of the world's largest regional airlines, with more than 14,000 employees and operating more than 220 regional aircraft on approximately 1,400 daily flights to nearly 150 cities throughout the United States, Canada, the Bahamas, Mexico and the Caribbean.
Answer: 56