The St. Louis blues is a type of blues music. It is usually more piano-based than other forms of the blues, and is closely related to the jump blues, ragtime and piano blues. Typically, a small number of singers, a pianist and a few other instruments (used primarily for rhythm) make up a band.
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DB is the abbreviation for Deutsche Bahn, the major German railway company
DB is the abbreviation of Dominion Breweries[?], a major beer brewing ...