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 first dyson vacuum cleaner invented?" whose answer is 1979.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when was the first dyson vacuum cleaner invented
Useful Output:

Doc 1: In 1991 James Dyson started a company of thoughtfully designed household products that innovate through the use of air.
Doc 2: James Dyson's Early Products. The bagless vacuum cleaner was not Dyson's first invention. In 1970, while he was still a student at London's
Doc 3: Probably his most famous invention, after more than 5,000 rejected prototypes, Dyson debuted his spin on the vacuum cleaner in 1991.  The
Doc 4: James Dyson's cyclonic bagless cleaners, first seen in 1986, were the first major step forward for decades. The Dyson G-Force. This design
Doc 5: In 1986, production of what we called G-force began. It looked quite different from the final Dyson design – it was bright pink – but it won a