Which Nation has the USA-18 sail?
CREATE TABLE table_name_91 (nation VARCHAR, sail VARCHAR)
SELECT nation FROM table_name_91 WHERE sail = "usa-18"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_91 (nation VARCHAR, sail VARCHAR) Question: Which Nation has the USA-18 sail? [/INST] SELECT nation FROM table_name_91 WHERE sail = "usa-18" </s>