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 did lift every voice and sing became black national anthem?" whose answer is 1919.
Each document should contain about 30 words, and these documents should contain useful information.

Query: "Lift Every Voice and Sing" black national anthem history
Useful Output:

Doc 1: "Lift Every Voice and Sing," an anthem with a surging melody and a promise of hope and freedom, has been a part of family, political, and social life in Black
Doc 2: James Weldon Johnson's "Lift Every Voice and Sing," colloquially known as the Black national anthem, was originally written late in 1899, James
Doc 3: Written in 1900 as a prayer of thanksgiving and freedom, "Lift Every Voice and Sing" is sometimes referred to as the "Black National Anthem"
Doc 4: “Lift Every Voice and Sing” was written and composed by James Weldon Johnson and his younger brother John Rosamond Johnson. They were
Doc 5: Many people are surprised to learn that "Lift Every Voice and Sing" was first written as a poem. Created by James Weldon Johnson,