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: "where do historians believe the black death originated?" whose answer is Central Asia.
Each document should contain about 30 words, and these documents should contain useful information.

Query: origin of the Black Death
Useful Output:

Doc 1: DNA from plague bacteria has been identified in graves from 1338 in Kyrgyzstan, and these pathogens appear to be the ancestors of those that caused the Black
Doc 2: A new study in Nature claims to identify the Black Death's original strain from 14th century central Asia.
Doc 3: Genomes show that plague-causing bacteria found in Kyrgyzstan graves are direct ancestors of those that triggered the medieval pandemic.
Doc 4: It probably started in Central Asia, around 1338 | Science & technology.
Doc 5: The sudden onset of plague in Southeastern Europe and the Middle East in the winter of 1346-47 which began the epidemic known as the Black Death.