Which track was used on September 12, 1981? 
CREATE TABLE table_22765887_1 (track VARCHAR, date VARCHAR)
SELECT track FROM table_22765887_1 WHERE date = "September 12, 1981"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_22765887_1 (track VARCHAR, date VARCHAR) Question: Which track was used on September 12, 1981?  [/INST] SELECT track FROM table_22765887_1 WHERE date = "September 12, 1981" </s>