What is the 1991 when 1997 is 18?
CREATE TABLE table_name_26 (Id VARCHAR)
SELECT 1991 FROM table_name_26 WHERE 1997 = "18"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_26 (Id VARCHAR) Question: What is the 1991 when 1997 is 18? [/INST] SELECT 1991 FROM table_name_26 WHERE 1997 = "18" </s>