Question: In which region is the lake, found in Patagonia and shared by Argentina and Chile, located?
Sentence (from "Meseta Cosmelli Airport"): Meseta Cosmelli Airport (Spanish: "Aeropuerto Meseta Cosmelli" ), (ICAO: SCMC) is an airstrip 18 km northeast of Puerto Guadal , a small town on the southwestern shore of General Carrera Lake in the Aysén Region of Chile.
Relevant evidence: Yes