Which class had a number under 4 and was built in 1988?
CREATE TABLE table_name_52 (class VARCHAR, number VARCHAR, built VARCHAR)
SELECT class FROM table_name_52 WHERE number < 4 AND built = "1988"
### Context: CREATE TABLE table_name_52 (class VARCHAR, number VARCHAR, built VARCHAR) ### Question: Which class had a number under 4 and was built in 1988? ### Answer: SELECT class FROM table_name_52 WHERE number < 4 AND built = "1988"