What predecessor has a district less than 11, 68th as the Congress, and may 1, 1923 as the date?
CREATE TABLE "list_of_special_elections" (
  "district" real,
  "congress" text,
  "date" text,
  "predecessor" text,
  "winner" text
);
SELECT "predecessor" FROM "list_of_special_elections" WHERE "district"<11 AND "congress"='68th' AND "date"='may 1, 1923';