Question: Felice Trojani collaborated with Umberto Nobile on which aircraft that was the first to reach the North Pole?
Sentence (from "Aeronautica Umbra Trojani AUT.18"): It was designed in 1934 by Ing Felice Trojani, who at that time was collaborating with Umberto Nobile on the Arctic flights of the airships "Norge" and "Italia".
Relevant evidence: Yes