Please answer the following question: Information:  - Berlin Tegel Airport is the main international airport of Berlin, the federal capital of Germany. It has served formerly West Berlin and ranks ahead of the smaller Berlin Schönefeld Airport. The airport is christened after Otto Lilienthal and the fourth busiest airport in Germany with just over 20.7 million passengers in 2014. The airport is a hub for Air Berlin and serves as a base for Germanwings. It features flights to several European metropolitan and leisure destinations as well as some intercontinental routes.  - 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).  - Air Berlin PLC & Co. Luftverkehrs KG, branded as airberlin or airberlin.com, is Germany's second largest airline, after Lufthansa, and Europe's seventh largest airline in terms of passengers carried. It maintains hubs at Berlin Tegel Airport and Düsseldorf Airport and operates a route network that includes a total of 17 German cities, some European metropolitan and several leisure destinations in Southern Europe and North Africa, as well as intercontinental services to destinations in the Caribbean and the Americas.  - This is a list of destinations served by TUIfly ( as of December 2012 ) , the fourth largest airline in Germany in terms of passengers . Charter flights or services operated by TUIfly aircraft on behalf of Air Berlin are not included . In 2011 , TUIfly offers scheduled flights to 36 destinations in 10 countries , 19 of which are year - round . Three new destinations will be launched during the year , compared to one that will be discontinued .  - TUI Group is a multinational travel and tourism company headquartered in Hannover, Germany. It is the largest leisure, travel and tourism company in the world, and owns travel agencies, hotels, airlines, cruise ships and retail stores. The group owns six European airlines - the largest holiday fleet in Europe - and nine tour operators based in Europe and Scandinavia.  - Hannover Airport is the international airport of Hannover (English: "Hanover"), the capital of the German state of Lower Saxony. It is the ninth largest airport in Germany and located in Langenhagen, north of the center of Hannover. The airport features flights to European metropolitan and leisure destinations and serves as a base for Germanwings, Condor, SunExpress Deutschland and TUIfly.  - Berlin is the capital and the largest city of Germany as well as one of its constituent 16 states. With a population of approximately 3.5 million people, Berlin is the second most populous city proper and the seventh most populous urban area in the European Union. Located in northeastern Germany on the banks of rivers Spree and Havel, it is the centre of the Berlin-Brandenburg Metropolitan Region, which has about 6 million residents from more than 180 nations. Due to its location in the European Plain, Berlin is influenced by a temperate seasonal climate. Around one-third of the city's area is composed of forests, parks, gardens, rivers and lakes.  - TUI fly Deutschland, formerly styled als "TUIfly", is a German leisure airline owned by the travel and tourism company TUI Group. It is headquartered at Hannover Airport with bases at several other German airports. TUIfly is part of the TUI Airlines.  - An airline is a company that provides air transport services for traveling passengers and freight. Airlines utilize aircraft to supply these services and may form partnerships or alliances with other airlines for codeshare agreements. Generally, airline companies are recognized with an air operating certificate or license issued by a governmental aviation body.  - Düsseldorf Airport (until March 2013 "Düsseldorf International Airport") is the international airport of Düsseldorf, the capital of the German state North Rhine-Westphalia. It is located approximately north of downtown Düsseldorf, and some south-west of Essen in the Rhine-Ruhr area, Germany's largest metropolitan area.  - North Africa or Northern Africa is the northernmost region of Africa. The United Nations definition of "North Africa" includes seven countries and territories; Algeria, Egypt, Libya, Mauritania, Morocco, Sudan, Tunisia, and Western Sahara. The countries of Algeria, Morocco, Tunisia, and Libya are often collectively referred to as the Maghreb, which is the Arabic word for "sunset". Egypt lies to the northeast and encompasses part of West Asia, while Sudan is situated on the edge of the Sahel, to the south of Egypt.  - Germany, officially the Federal Republic of Germany, is a federal parliamentary republic in central-western Europe. It includes 16 constituent states, covers an area of , and has a largely temperate seasonal climate. With about 82 million inhabitants, Germany is the most populous member state of the European Union. After the United States, it is the second most popular immigration destination in the world. Germany's capital and largest metropolis is Berlin. Other major cities include Hamburg, Munich, Cologne, Frankfurt, Stuttgart and Düsseldorf.  - The Caribbean (or ) is a region that consists of the Caribbean Sea, its islands (some surrounded by the Caribbean Sea and some bordering both the Caribbean Sea and the North Atlantic Ocean) and the surrounding coasts. The region is southeast of the Gulf of Mexico and the North American mainland, east of Central America, and north of South America.    'tuifly destinations' is related to which object entity through the relation of 'is a list of'?  Choices: - aircraft  - airline  - airport  - capital  - city  - company  - gulf  - people  - star  - state  - term  - word
Answer:
airport