CREATE TABLE table_40918 ("Title" CLOB, "Director" CLOB, "Producer" CLOB, "Production Cost" CLOB, "Singapore Gross" CLOB)

For the directed by 1991, what was the gross in Singapore?
SELECT "Singapore Gross" FROM table_40918 WHERE "Director" = '1991'
SELECT "Singapore Gross" FROM "table_40918" WHERE "Director" = '1991'