CREATE TABLE table_26050 ("Episode #" FLOAT, "Season #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original airdate" TEXT, "Production code  ( order they were made )  #" FLOAT)

Who are all directors when Sherwood Schwartz is the writer?
SELECT "Directed by" FROM table_26050 WHERE "Written by" = 'Sherwood Schwartz'
SELECT "Directed by" FROM "table_26050" WHERE "Written by" = 'Sherwood Schwartz'