Question: Envoy Air is a wholly owned subsidiary of an airline group that flies to how many countries worldwide?

Related documents: [0]  [DOC] 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. [END] 
[1]  [DOC] 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. [END]  
Answer: 56
56