The episode with the no. 54, directed by Charles Haid, is written by who?
CREATE TABLE "table1_26561509_1" (
  "no" real,
  "num" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "patient_portrayer" text,
  "original_air_date" text,
  "production_code" text
);
SELECT "written_by" FROM "table1_26561509_1" WHERE "directed_by"='Charles Haid' AND "no"=54;