CREATE TABLE table_73450 ("No." FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB, "Viewers  ( in millions ) " CLOB)

How many directors were there for the production code 1ark08?
SELECT COUNT("Directed by") FROM table_73450 WHERE "Production code" = '1ARK08'
SELECT COUNT("Directed by") FROM "table_73450" WHERE "Production code" = '1ARK08'