CREATE TABLE table_52670 ("Series no." FLOAT, "Season no." FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production Code" FLOAT)

Who wrote the series number 49 with a season larger than 4?
SELECT "Written by" FROM table_52670 WHERE "Season no." > '4' AND "Series no." = '49'
SELECT "Written by" FROM "table_52670" WHERE "Season no." > '4' AND "Series no." = '49'