Question: Which aircraft designer was born in Frankfurt am Main and had a model produced by Bayerische Flugzeugwerke?
Sentence (from "BFW M.23"): The BFW M.23, sometimes known as the Messerschmitt M 23, was a 1920s two-seat sporting aircraft designed by Willy Messerschmitt, and produced by "Bayerische Flugzeugwerke" (BFW).
Relevant evidence: Yes