Simplify the following text for a Grade 13 native English-speaking person.
Original: The Westdeutscher Rundfunk ( WDR , official `` Westdeutscher Rundfunk KÃ ln '' ) is a German public-broadcasting institution based in the Federal State of North Rhine-Westphalia with its main office in Cologne .
Simplified: Westdeutscher Rundfunk ( WDR , West German Broadcasting ) is a German public-broadcasting institution based in the Federal State of North Rhine-Westphalia with its main office in Cologne .