Question: The Deutsche Gesellschaft für Schädlingsbekämpfung mbH (translation: German Corporation for Pest control), in short Degesch, is a German chemical corporation, Degesch had the patent of the infamous Zyklon B, was the trade name of a cyanide-based pesticide invented in which country in the early 1920s?
Sentence (from "Tesch &amp; Stabenow"): The corporation Tesch & Stabenow (in short Testa) was a market leader in pest control chemicals between 1924 and 1945 in Germany east of the Elbe.
Relevant evidence: No