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: "Which Earl allegedly founded the English colony granted land by the Byzantine Emperor Alexius I Comnenus?" whose answer is Siward earl of Gloucester.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Earl who allegedly founded an English colony granted land by Byzantine Emperor Alexius I Comnenus
Useful Output:

Doc 1: Key Figures in Medieval Europe: An Encyclopedia provides a broad introduction to the biographical knowledge collected and investigated by modern scholarship
Doc 2: Предлагаемое пособие представляет собой первую часть курса истории Англии - от древнейших времён до эпохи Карла II. Книга знакомит читателя с особенностями.
Doc 3: The emperor granted this land to the English, and a party led by Earl Siward sailed for this land while another party of English remained in the service of
Doc 4: 'The emperor granted this land to the English, and a party led by Earl Siward sailed for this land while another party of English remained in
Doc 5: 1082 Emperor Alexius I grants Venice extraordinary concessions for its help against Robert.  Alexius IV Comnenus forms the Empire of Trebizond as a rump state.