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: "who began to rule england in the 1000s?" whose answer is King Cnut.
Each document should contain about 30 words, and these documents should contain useful information.

Query: first king of England in the 1000s
Useful Output:

Doc 1: Born at Wantage, Berkshire, in 849, Alfred was the fifth son of Aethelwulf, king of the West Saxons. At their father's behest and by mutual agreement,
Doc 2:  British monarchy lie deep in the Early Middle Ages. Who was the first King of England? Interestingly, the harrowing Viking invasions of the
Doc 3: King Edward died in July 924; yet Aethelstan was not crowned until September 925. Whilst coronations were not always immediate – it was
Doc 4: He reigned between AD925 and AD939 and was the very first 'King of all England'.  BBC Teach has thousands of free, curriculum-linked resources to help
Doc 5: Athelstan (died October 27, 939) was the first West Saxon king to have effective rule over the whole of England.