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 hd tv introduced in the uk?" whose answer is 2006.
Each document should contain about 30 words, and these documents should contain useful information.

Query: introduction of HD TV in the UK
Useful Output:

Doc 1: On 2nd November 1936, BBC Television began broadcasting regular programmes to the London area from Alexandra Palace – arguably the start of
Doc 2: In 1929 Baird convinced the British Broadcasting Corporation (BBC) to allow him to produce half-hour shows at midnight three times a week. The
Doc 3: HDTV is a high resolution digital television signal that is combined with Dolby Digital surround sound.
Doc 4: 2006 has seen the arrival of high definition (HD) broadcasting in the UK, in the wake of strong sales of HD Ready TV sets, the first HD service launches, and
Doc 5: Want to know more about TV resolutions but aren't sure what they are? This page gives you a beginner's guide to understanding the evolution