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: "what five countries border on the caspian sea?" whose answer is Azerbaijan.
Each document should contain about 30 words, and these documents should contain useful information.

Query: countries bordering the caspian sea
Useful Output:

Doc 1: Bordering countries: It is bordered by Russia and Azerbaijan on the west, Kazakhstan and Turkmenistan on the north and east, and Iran on the
Doc 2: The Caspian Sea, bordered by Azerbaijan, Iran, Kazakhstan, the Russian Federation, and Turkmenistan, boasts exceptional biological diversity and rich oil
Doc 3: It is bordered to the north and east by Kazakhstan and from north to the west by Russia. Azerbaijan borders the sea to the southwest, while Iran
Doc 4: Bordered by Russia (northwest), Azerbaijan (west), Iran (south), Turkmenistan (southeast) and Kazakhstan (northeast). In 2003, the Caspian
Doc 5: In the North lies the countries of Russia and Kazakhstan. In the South lies Iran, South East lies Turkmenistan, and South-West lies Azerbaijan.