Which nationality is player Brian Wilks?
CREATE TABLE table_21721351_18 (nationality VARCHAR, player VARCHAR)
SELECT nationality FROM table_21721351_18 WHERE player = "Brian Wilks"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_21721351_18 (nationality VARCHAR, player VARCHAR) Question: Which nationality is player Brian Wilks? [/INST] SELECT nationality FROM table_21721351_18 WHERE player = "Brian Wilks" </s>