Question: What is the area of this region of Central Europe located mostly in Poland, in which Złotniki Lubańskie was formerly part of the historic Upper Lusatia region at its border?
Sentence (from "Bad Muskau"): Bad Muskau (] ; formerly "Muskau", Upper Sorbian: "Mužakow" , Polish: "Mużaków" ) is a spa town in the historic Upper Lusatia region in Germany at the border with Poland.
Relevant evidence: No