Question: In which region is the lake, found in Patagonia and shared by Argentina and Chile, located?
Sentence (from "Patagonia Rebelde"): At least two Argentine soldiers (corporal Domingo Montenegro and private Fernando Pablo Fischer), three local policemen (sergeant Tomás Rosa and constables Ernesto Bozán and Juan Campos) and a number of ranch owners and their relatives also died during the strife.
Relevant evidence: No