CREATE TABLE table_203_752 (id NUMBER, "rank" NUMBER, "circuit" CLOB, "headquarters" CLOB, "screens" NUMBER, "sites" NUMBER)

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'