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"
### Context: CREATE TABLE table_21721351_18 (nationality VARCHAR, player VARCHAR) ### Question: Which nationality is player Brian Wilks? ### Answer: SELECT nationality FROM table_21721351_18 WHERE player = "Brian Wilks"