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: "where did the vikings first land in scotland?" whose answer is Northern Isles.
Each document should contain about 30 words, and these documents should contain useful information.

Query: where was the first viking settlement in shetland
Useful Output:

Doc 1: Exactly when settlement in the 800s began remains unclear, but Harald himself sailed over, took control of both Shetland and Orkney and gave
Doc 2: It is thought that Neolithic people first came to Shetland around 5000-6000 years ago during the bronze age, evidenced by ancient remains of a
Doc 3: Norwick: Shetland's first viking settlement? · West over Sea. Studies in Scandinavian Sea-Borne Expansion and Settlement Before 1300. Series:
Doc 4: Upper Underhoull was excavated in 2007-8 as part of Shetland Amenity Trust's Viking Unst project, along with longhouses at Hamar and Belmont.
Doc 5: Jarlshof is the best-known prehistoric archaeological site in Shetland, Scotland. It lies in Sumburgh, Mainland, Shetland and has been described as "one of