Question:  Nikolai Mikhaylovich Albov is credited with being the first European explorer to have traveled extensively over an archipelago off the southernmost tip of the South American mainland across what strait?         
Sentence (from "Nikolai Albov"): Nikolai Mikhaylovich Albov (Russian: Николай Михайлович Альбов , 15 October 1866 — 6 December 1897, La Plata, Argentina) was a Russian botanist and geographer.
Relevant evidence: Yes