CREATE TABLE table_204_184 (id DECIMAL, "#" DECIMAL, "title" TEXT, "producer ( s ) " TEXT, "featured guest ( s ) " TEXT, "length" TEXT)

how many of his tracks does nitti have a guest on ?
SELECT COUNT("title") FROM table_204_184 WHERE "producer(s)" = 'nitti' AND NOT "featured guest(s)" IS NULL
SELECT COUNT("title") FROM "table_204_184" WHERE "producer(s)" = 'nitti' AND NOT "featured guest(s)" IS NULL