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: "Between the BMW 3 series and BMW 4 series, which year was the earlier one released?" whose answer is 2011.
Each document should contain about 30 words, and these documents should contain useful information.

Query: BMW 3 Series release year
Useful Output:

Doc 1: This sixth-generation version ran from 2012 to 2019 as an executive saloon or an estate, and due to it being incredibly popular as a company car
Doc 2: In 1982, the new 3 Series was launched as a two-door sedan, with the four-door sedan available from September 1983 onwards. All of the second-
Doc 3: Read the definitive BMW 3 Series 2025 review from the expert What Car? team. Check specs, prices, performance and compare with similar cars.
Doc 4:  2025 BMW 3 SERIES 50 YEARS EDITION 5  Date: April 28, 2025. Every BMW X5 Generation Ranked by Reliability.
Doc 5: The E21 was the first of the BMW 3 Series generations, and it was sold in the US as four-cylinder cars only from 1977-1983.