You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the 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?" whose answer is Germany.
Each document should contain about 30 words, and these documents should contain useful information.

Query: origin of Zyklon B
Useful Output:

Doc 1: Third Reich chemists invented the devastating chemical weapons, but the Nazis didn't deploy them against the Allies during World War II.
Doc 2: Zyklon-B, brand name for a hydrogen cyanide–based chemical compound initially created as a pesticide and rodenticide in the early 1920s in
Doc 3: An iconic Hamburg building, built by Jews and now a chocolate museum, once housed the distributors of one of Nazi Germany's most gruesome
Doc 4: Arizona has refurbished and tested a gas chamber and purchased chemicals used to make hydrogen cyanide, a recent report said, drawing a backlash over its
Doc 5: Zyklon B, commonly known as hydrogen cyanide (HCN), was the poisonous gas used to kill Jews and others in gas chambers during the Holocaust.