Who was the Hessen the year that Saar was FK Pirmasens?
CREATE TABLE "1928_to_1933" (
  "year" real,
  "main" text,
  "hessen" text,
  "rhein" text,
  "saar" text
);
SELECT "hessen" FROM "1928_to_1933" WHERE "saar"='fk pirmasens';