CREATE TABLE table_203_752 (id DECIMAL, "rank" DECIMAL, "circuit" TEXT, "headquarters" TEXT, "screens" DECIMAL, "sites" DECIMAL)

what are the number of sites national amusements have ?
SELECT "sites" FROM table_203_752 WHERE "circuit" = 'national amusements'
SELECT "sites" FROM "table_203_752" WHERE "circuit" = 'national amusements'