Question: The Curtis Fling School was started by Glenn Curtiss to compete against the flying school of what brothers who made the first controlled, sustained flight of a powered, heavier-than-air aircraft on December 17, 1903?
Sentence (from "Wright brothers"): Although not the first to build and fly experimental aircraft, the Wright brothers were the first to invent aircraft controls that made fixed-wing powered flight possible.
Relevant evidence: No