Which Decision has a Visitor of calgary, a Score of 2 – 1, and a Series of 4 – 3?
CREATE TABLE "western_conference_quarter_finals_vs_6_c" (
  "date" text,
  "visitor" text,
  "score" text,
  "home" text,
  "decision" text,
  "series" text
);
SELECT "decision" FROM "western_conference_quarter_finals_vs_6_c" WHERE "visitor"='calgary' AND "score"='2 – 1' AND "series"='4 – 3';