Question: What other country besides Poland contains part of the historical and geographical region where Buława is located?
Sentence (from "Upper Silesia"): Upper Silesia (Polish: "Górny Śląsk" ; Silesian: "Gůrny Ślůnsk"; Czech: "Horní Slezsko" ; German: "Oberschlesien" ; Silesian German: "Oberschläsing"; Latin: "Silesia Superior" ) is the southeastern part of the historical and geographical region of Silesia, located mostly in Poland, with small parts in the Czech Republic.
Relevant evidence: Yes