What is the nationality of the player who played guard in 2006?
CREATE TABLE "list_of_minnesota_timberwolves_players_s" (
  "name" text,
  "nationality" text,
  "school_club" text,
  "season_s" text,
  "position_s" text
);
SELECT "nationality" FROM "list_of_minnesota_timberwolves_players_s" WHERE "position_s"='guard' AND "season_s"='2006';