(1) It consists of two parts , Zemendorf and Stottera , which are both upstream from Pottelsdorf and downstream from Antau on the Wulka .
(2) It consists of two parts , Zemendorf and Stottera , both of which lie on the River Wulka upstream from Pottelsdorf and downstream from Antau .

Do these two sentences mean the same thing?

*no;
*yes;
yes