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Need a paper for an internet article explaining the different types of working l

Need a paper for an internet article explaining the different types of working line germans shepherds. West German Working Lines, Czech Lines, and DDR. Show lines and pet lines can be excluded. Need an overview of where each subset (West, Czech, and DDR) originated, the goal of their breeding programs, characteristics and traits of the dogs produced, and any other relevant info. Should be around 2500+ words