CREATE TABLE table_218 ("Race Name" CLOB, "Circuit" CLOB, "Date" CLOB, "Winning driver" CLOB, "Constructor" CLOB, "Report" CLOB)

What is the date on which a race was run at Halle-Saale-Schleife circuit?
SELECT "Date" FROM table_218 WHERE "Circuit" = 'Halle-Saale-Schleife'
SELECT "Date" FROM "table_218" WHERE "Circuit" = 'Halle-Saale-Schleife'