CREATE TABLE table_16766 ("Race Name" CLOB, "Circuit" CLOB, "Date" CLOB, "Winning driver" CLOB, "Constructor" CLOB, "Report" CLOB)

Who constructed the Syracuse circuit?
SELECT "Constructor" FROM table_16766 WHERE "Circuit" = 'Syracuse'
SELECT "Constructor" FROM "table_16766" WHERE "Circuit" = 'Syracuse'