which musical opera or drama, Singspiel or Fedora, is a most notable work from Giordano?
Fedora (opera):  Along with "Andrea Chénier" and "Siberia", it is one of the most notable works of Giordano. Singspiel: A Singspiel (] ; plural: Singspiele; literally "sing-play") is a form of German-language music drama, now regarded as a genre of opera.
i don't know