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: "when was the baikal-amur mainline (bam) railroad completed in the russian domain?" whose answer is 1991.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when was the Baikal-Amur Mainline completed
Useful Output:

Doc 1: Baikal-Amur Mainline. Language · Watch · Edit. This article is an  The line was officially completed in 1984, although actual work continued until 1991.
Doc 2: However, the majority of the mainline was built between 1974 and 1984, under the authority of the Soviet industrial program focused on “
Doc 3: A full-scale construction of the Baikal-Amur Mainline commenced in April 1974 with over two million people engaged in the project. Spanning a
Doc 4: Baikal-Amur Mainline. Contents. 1 Understand. 2 Prepare. 3 Get in. 4  The line was officially completed in 1984, although actual work continued until 1991.
Doc 5: The AYaM, which has a more recent history as a passenger transport route (the passenger train service was only opened in July 2019),Footnote