CREATE TABLE table_name_58 (built VARCHAR2, number_in_class VARCHAR2, owner VARCHAR2)

What was built in a class with less than 10, and the Downer Rail owner?
SELECT built FROM table_name_58 WHERE number_in_class < 10 AND owner = "downer rail"
SELECT "built" FROM "table_name_58" WHERE "downer rail" = "owner" AND "number_in_class" < 10