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"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: 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? [/INST] SELECT date FROM table_1140116_6 WHERE circuit = "Halle-Saale-Schleife" </s>