How many centerfold models were there when the cover model was Torrie Wilson?
CREATE TABLE "2003" (
  "date" text,
  "cover_model" text,
  "centerfold_model" text,
  "interview_subject" text,
  "20_questions" text,
  "pictorials" text
);
SELECT COUNT("centerfold_model") FROM "2003" WHERE "cover_model"='Torrie Wilson';