what is the previous conference when the year joined is 1932 and the mascot is tigers?
CREATE TABLE "former_members" (
  "school" text,
  "location" text,
  "mascot" text,
  "county" text,
  "year_joined" text,
  "previous_conference" text,
  "year_left" text
);
SELECT "previous_conference" FROM "former_members" WHERE "year_joined"='1932' AND "mascot"='tigers';