What's the Nordbayern with a Württemberg of Union Böckingen in the year before 1932?
CREATE TABLE "1928_to_1933" (
  "year" real,
  "baden" text,
  "w_rttemberg" text,
  "nordbayern" text,
  "s_dbayern" text
);
SELECT "nordbayern" FROM "1928_to_1933" WHERE "year"<1932 AND "w_rttemberg"='union böckingen';