What is the number of the year withdrawn for a LSWR number greater than 210 and a To LoW year of 1923?
CREATE TABLE "references" (
  "br_sr_no" text,
  "sr_name" text,
  "lswr_no" real,
  "builder" text,
  "built" real,
  "to_io_w" real,
  "withdrawn" real
);
SELECT COUNT("withdrawn") FROM "references" WHERE "lswr_no">210 AND "to_io_w"=1923;