Who directed the episode that was written by Bill Lawrence? 
CREATE TABLE "table1_25547943_1" (
  "series_num" real,
  "season_num" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" real
);
SELECT "directed_by" FROM "table1_25547943_1" WHERE "written_by"='Bill Lawrence';