claim: The Latvian Soviet Socialist Republic was a state of the Soviet Union.
evidence: Bukovica river is the longest river in the municipality of Savnik .. Savnik. Savnik. It originates under the Ranisava mountain , and flows into Komarnica River .. Komarnica River. Komarnica River. It is 42 km long .. Its main tributaries are Savnik River and Bijela River .. Savnik. Savnik. Savnik River. Savnik River. Bijela River. Bijela River. Category  : Rivers of Montenegro