CREATE TABLE table_203_501 (id DECIMAL, "title" TEXT, "genre" TEXT, "sub\\u00addivisions" TEXT, "libretto" TEXT, "premiere date" TEXT, "place ,  theatre" TEXT)

what are the number of titles that premiered in the month of september ?
SELECT COUNT(DISTINCT "title") FROM table_203_501 WHERE "premiere date" = 9
SELECT COUNT(DISTINCT "title") FROM "table_203_501" WHERE "premiere date" = 9