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Knurów ([ˈknuruf]; German: Knurow; Silesian: Knurůw) is a town near Katowice in Silesia , southern Poland . Knurów borders on the Upper Silesian Metropolitan Union, a metropolis with a population of two million . Knurów is located in the Silesian Highlands, on the Bierawka River , a tributary of the Oder River .