Question: The Albatros L 79 Kobold was a single-seat German aerobatic aircraft of the 1920s and 1930s, the kobold (occasionally cobold) is which type of entity, stemming from Germanic mythology, and surviving into modern times in German folklore?
Sentence (from "Extra EA-260"): One EA-260 was flown by Patty Wagstaff to victory in two U.S. National Aerobatic Championships, (1991 and 1992), and then retired for an Extra 300S.
Relevant evidence: No