During the voting order 11, when the commentator was pierre tchernia, who was the spokesperson?
CREATE TABLE "international_broadcasts_and_voting" (
  "voting_order" real,
  "country" text,
  "spokespersons" text,
  "commentator" text,
  "broadcaster" text
);
SELECT "spokespersons" FROM "international_broadcasts_and_voting" WHERE "commentator"='pierre tchernia' AND "voting_order"=11;