What is the semi-final television commentator status in 1962 with an unknown spokesperson?
CREATE TABLE "commentators_and_spokespersons" (
  "year_s" real,
  "grand_final_television_commentator" text,
  "grand_final_dual_television_commentator" text,
  "spokesperson" text,
  "semi_final_television_commentator" text,
  "semi_final_dual_television_commentator" text
);
SELECT "semi_final_television_commentator" FROM "commentators_and_spokespersons" WHERE "spokesperson"='unknown' AND "year_s"=1962;