Name the mountain range for nunavut with location of 73.2294°n 78.6233°w
CREATE TABLE "the_50_most_topographically_isolated_mou" (
  "rank" real,
  "mountain_peak" text,
  "province" text,
  "mountain_range" text,
  "location" text
);
SELECT "mountain_range" FROM "the_50_most_topographically_isolated_mou" WHERE "province"='nunavut' AND "location"='73.2294°n 78.6233°w';