What date is the Portuguese Grand Prix?
CREATE TABLE table_name_30 (date VARCHAR, grand_prix VARCHAR)
SELECT date FROM table_name_30 WHERE grand_prix = "portuguese grand prix"
### Context: CREATE TABLE table_name_30 (date VARCHAR, grand_prix VARCHAR) ### Question: What date is the Portuguese Grand Prix? ### Answer: SELECT date FROM table_name_30 WHERE grand_prix = "portuguese grand prix"