CREATE TABLE table_40914 ("Title" CLOB, "Director" CLOB, "Producer" CLOB, "Production Cost" CLOB, "Singapore Gross" CLOB)

Who was the director for the film produced by River Films?
SELECT "Director" FROM table_40914 WHERE "Producer" = 'river films'
SELECT "Director" FROM "table_40914" WHERE "Producer" = 'river films'