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 moon river in the movie breakfast at tiffany?" whose answer is Audrey Hepburn.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Who sang Moon River in Breakfast at Tiffany's
Useful Output:

Doc 1: Moon River Andy Williams Álbum: Devoted to you Letra: Johnny Mercer Musica: Henry Mancini Breakfast at Tiffany's Classical Songs.
Doc 2: It was originally performed by Audrey Hepburn in the 1961 movie Breakfast at Tiffany's, winning an Academy Award for Best Original Song. The
Doc 3: I think that "Moon River" composed by Henry Mancini and Johnny Mercer for the film "Breakfast At Tiffany's is one of the finest movie songs
Doc 4: Breakfast at Tiffany's • Moon River • Henry Mancini & Andy Williams · Comments165.
Doc 5: In 1961, Henry Mancini and Johnny Mercer's “Moon River” was featured in Breakfast at Tiffany's and took home the Oscar for Best Original Song.