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 last time sunderland were relegated?" whose answer is the 1986–87 season.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Sunderland last relegated
Useful Output:

Doc 1: Sunderland have been relegated to League One. Official source  Just how many have Sunderland conceded in the last few minutes of matches?
Doc 2: From current England number one Jordan Pickford to on-loan Rangers striker Jermain Defoe, HITC Sevens takes a look at the Sunderland team
Doc 3: Today, we receive some shocking news that the club has failed to make the cut in the second division in England and have been relegated again
Doc 4: Sunderland have been relegated to League One after defeat against fellow strugglers Burton Albion at the Stadium of Light.
Doc 5: SUNDERLAND were relegated to England's third tier for the first time in 30 years on Saturday as the Championship's bottom club lost 2-1 to