CREATE TABLE table_51681 ("Race" CLOB, "Date" CLOB, "Location" CLOB, "Pole Position" CLOB, "Fastest Lap" CLOB, "Race Winner" CLOB, "Constructor" CLOB, "Report" CLOB)

Tell me the constructor for zolder
SELECT "Constructor" FROM table_51681 WHERE "Location" = 'zolder'
SELECT "Constructor" FROM "table_51681" WHERE "Location" = 'zolder'