Question: What eastern European border was disputed between it's two nations after World War I, was re-established in 1990 as an identical version of its former self, changed only in the name of one of it's nations?
Sentence (from "Suwałki Region"): Suwałki Region (Polish: "Suwalszczyzna" , Lithuanian: "Suvalkų kraštas, Suvalkija" ) is a small region around the city of Suwałki (known in Lithuanian as "Suvalkai") in northeastern Poland near the border with Lithuania.
Relevant evidence: Yes