What is the date on which a race was run at Halle-Saale-Schleife circuit?
CREATE TABLE table_1140116_6 (date VARCHAR, circuit VARCHAR)
SELECT date FROM table_1140116_6 WHERE circuit = "Halle-Saale-Schleife"
### Context: CREATE TABLE table_1140116_6 (date VARCHAR, circuit VARCHAR) ### Question: What is the date on which a race was run at Halle-Saale-Schleife circuit? ### Answer: SELECT date FROM table_1140116_6 WHERE circuit = "Halle-Saale-Schleife"