What is listed in built for when the original number is 24d?
CREATE TABLE "class_34_500_ge_type_u26_c" (
  "ge_dl_works_no" real,
  "year_built" text,
  "built_for" text,
  "original_no" text,
  "new_owner" text,
  "new_no" text
);
SELECT "built_for" FROM "class_34_500_ge_type_u26_c" WHERE "original_no"='24D';