What is the year of appearance for the Prince Albert Raiders? 
CREATE TABLE "active_teams" (
  "tournament_appearances" real,
  "team" text,
  "league" text,
  "wins" real,
  "final_losses" real,
  "semi_final_losses" real,
  "fourth_place" real,
  "final_win_pct" text,
  "years_of_appearance" text
);
SELECT "years_of_appearance" FROM "active_teams" WHERE "team"='Prince Albert Raiders';