Question: Felice Trojani collaborated with Umberto Nobile on which aircraft that was the first to reach the North Pole?
Sentence (from "Norge (airship)"): The expedition was the brainchild of polar explorer and expedition leader Roald Amundsen, the airship's designer and pilot Umberto Nobile and American explorer Lincoln Ellsworth, who along with the Aero Club of Norway, financed the trip which was known as the Amundsen-Ellsworth 1926 Transpolar Flight.
Relevant evidence: No