CREATE TABLE table_name_27 (written_by VARCHAR, season_no VARCHAR, series_no VARCHAR)

Who wrote the series number 49 with a season larger than 4?
SELECT written_by FROM table_name_27 WHERE season_no > 4 AND series_no = 49
SELECT "written_by" FROM "table_name_27" WHERE "season_no" > 4 AND "series_no" = 49