Question: The CASA 2. 111 was a medium bomber derived from what German aircraft that was designed by Siegfried and Walter Gunter at Heinkel Flugzeugwerke in 1934?
Sentence (from "CASA 2.111"): The CASA 2.111 was a medium bomber derived from the Heinkel He 111 and produced in Spain under licence by Construcciones Aeronáuticas SA (CASA).
Relevant evidence: Yes