Who wrote the series number 49 with a season larger than 4?
CREATE TABLE "season_2_2007_08" (
  "series_no" real,
  "season_no" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" real
);
SELECT "written_by" FROM "season_2_2007_08" WHERE "season_no">4 AND "series_no"=49;