What circuit did Clay Regazzoni win?
CREATE TABLE table_1140090_6 (circuit VARCHAR, winning_driver VARCHAR)
SELECT circuit FROM table_1140090_6 WHERE winning_driver = "Clay Regazzoni"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_1140090_6 (circuit VARCHAR, winning_driver VARCHAR) Question: What circuit did Clay Regazzoni win? [/INST] SELECT circuit FROM table_1140090_6 WHERE winning_driver = "Clay Regazzoni" </s>