Please answer the following question: Information: - An aircraft is a machine that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines. - The G102 Astir is a single seat glassfibre Standard Class sailplane , designed by Burkhart Grob and built by Grob Aircraft . It was the first Grob - designed sailplane , with the first flight in December 1974 . Grob had previously built the Schempp - Hirth Standard Cirrus under licence . - Grob Aircraft is a German aircraft manufacturer, previously known as "Grob Aerospace". It has been manufacturing aircraft using carbon fiber reinforced polymer since the 1970s. - Schempp-Hirth Flugzeugbau GmbH is a glider manufacturer based in Kirchheim unter Teck, Germany. - Carbon fiber reinforced polymer, carbon fiber reinforced plastic or carbon fiber reinforced thermoplastic (CFRP, CRP, CFRTP or often simply carbon fiber, or even carbon), is an extremely strong and light fiber-reinforced plastic which contains carbon fibers. The spelling 'fibre' is common in British Commonwealth countries. - The Standard Cirrus is a German Standard-class glider built by Schempp-Hirth. The Standard Cirrus was produced between 1969 and 1985. 'grob g102 astir' is related to which object entity through the relation of 'subclass of'? Choices: - aircraft - carbon - class - fiber - german - glider - light - machine - support
Answer:
glider