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 1st Battle of Kharkov was named so by a person who was born in which year ?" whose answer is 1882.
Each document should contain about 30 words, and these documents should contain useful information.

Query: 1st Battle of Kharkov
Useful Output:

Doc 1:  Kharkov trial as “the first Nazi war crimes trial.”9Three Germans and one Ukrainian were tried in Kharkov before a military tribunal constituted by the 4th
Doc 2: The '1st Kharkov Defensive Operation', otherwise known as the '1st Battle of Kharkov', was undertaken by the Soviets to hold Kharkov during the final phase
Doc 3: English: October 1941 battle. Historical name is First Battle of Kharkov, not Kharkiv.
Doc 4: 1941 Eastern front battle of World War II.
Doc 5: The First Battle of Kharkov, so named by Wilhelm Keitel, was the 1941 battle for the city of Kharkov, Ukrainian SSR, during the final phase