What date has Vancouver Canucks as the original team, Ryan Kesler as the player, and matched as the Result?
CREATE TABLE "signed_offer_sheets" (
  "player" text,
  "date" text,
  "original_team" text,
  "offer_team" text,
  "result" text
);
SELECT "date" FROM "signed_offer_sheets" WHERE "original_team"='vancouver canucks' AND "result"='matched' AND "player"='ryan kesler';