Information:  - Munich Airport , , is a major international airport near Munich, the capital of Bavaria. It is the second busiest airport in Germany in terms of passenger traffic behind Frankfurt Airport, and the seventh busiest airport in Europe, handling 40,9 million passengers in 2015. It is the world's 15th busiest airport in terms of international passenger traffic, and was the 34th busiest airport worldwide in 2015. As of March 2015, the airport features flights to 228 destinations in 66 countries. Munich Airport serves as the secondary hub for Lufthansa including Lufthansa Regional and its Star Alliance partners besides Frankfurt. The airport served 42 million passengers in 2016  - Deutsche Lufthansa AG, commonly known as Lufthansa (sometimes also as "Lufthansa German Airlines"), is the largest German airline and, when combined with its subsidiaries, also the largest airline in Europe, in terms of fleet size, and the second largest airline in terms of passengers carried during 2016. It operates services to 18 domestic destinations and 197 international destinations in 78 countries across Africa, the Americas, Asia, and Europe, using a fleet of more than 270 aircraft. Lufthansa is one of the five founding members of Star Alliance, the world's largest airline alliance, formed in 1997. The name of the company is derived from Luft (the German word for "air"), and Hansa (a Latin term meaning "guild" most commonly used historically in reference to the Hanseatic League).  - Lufthansa CityLine GmbH is a German airline with its headquarters on the grounds of Munich Airport . It is a wholly owned subsidiary of Lufthansa and maintains hubs at Frankfurt Airport and Munich Airport , from where it operates a dense domestic and European network as a member of Lufthansa Regional . Since October 2015 , it also operates long - haul routes on behalf of its parent company .  - Star Alliance is one of the world's largest global airline alliances. Founded on 14 May 1997, its current CEO is Mark Schwab and its headquarters is in Frankfurt am Main, Germany. , Star Alliance is the second largest global alliance by passenger count with 641.1 million, after SkyTeam (665.4 million) and ahead of Oneworld (557.4 million). Its slogan is "The Way The Earth Connects".    What is the relationship between 'lufthansa cityline' and 'star alliance'?
A:
airline alliance