for how many years did the player who graduated from stanford play for Grizzlies?
CREATE TABLE "j" (
  "player" text,
  "nationality" text,
  "position" text,
  "years_for_grizzlies" text,
  "school_club_team" text
);
SELECT "years_for_grizzlies" FROM "j" WHERE "school_club_team"='stanford';