What was the nationality of a point guard position in 1999-2001?
CREATE TABLE "p" (
  "player" text,
  "nationality" text,
  "position" text,
  "years_for_grizzlies" text,
  "school_club_team" text
);
SELECT "nationality" FROM "p" WHERE "position"='point guard' AND "years_for_grizzlies"='1999-2001';