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 sang unchained melody in the righteous brothers?" whose answer is Bobby Hatfield.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who sang unchained melody with the righteous brothers
Useful Output:

Doc 1: Bobby Hatfield of the Righteous Brothers singing solo minus Bill Medley turned in an unforgettable performance of this song. Al Hibbler did the
Doc 2: The lead vocal was performed solo by Bobby Hatfield. His singing partner Bill Medley later said that they had agreed to do one solo piece each
Doc 3: Carol Ward. Unchained Melody is such a beautiful beautiful song  This song remains as Timeless now as when the Righteous brothers first sung it
Doc 4: One of the greatest songs ever and one of Spector's finest… or Medley if he really produced it. I certainly have no problem believing that
Doc 5: The Righteous Brothers still exist in the person of Bill Medley, but Bobby Hatfield died in his hotel room in 2003, prior to a performance with