Who constructed the car that Derek Warwick raced in with a TG181 chassis?
CREATE TABLE table_name_20 (constructor VARCHAR, chassis VARCHAR, driver VARCHAR)
SELECT constructor FROM table_name_20 WHERE chassis = "tg181" AND driver = "derek warwick"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_20 (constructor VARCHAR, chassis VARCHAR, driver VARCHAR) Question: Who constructed the car that Derek Warwick raced in with a TG181 chassis? [/INST] SELECT constructor FROM table_name_20 WHERE chassis = "tg181" AND driver = "derek warwick" </s>