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About the "Star-Spangled Banner"

1. Its music is used in more than 80 other works

2. Unofficial U.S. national anthem in 1914; became official in 1931

3. Traditional at other sporting events in World War II

4. Congress tried to change key in 1971, failed

5. Baseball first used it in the seventh-inning stretch in 1918 World Series game*

*There is debate about this; others cite opening day 1897, in Philadelphia

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