CREATE TABLE table_name_4 (prr_class VARCHAR2, build_date VARCHAR2, wheel_arrangement VARCHAR2, service VARCHAR2)

What is the PRR class of the freight train built in 1967 with a b-b wheel arrangement?
SELECT prr_class FROM table_name_4 WHERE wheel_arrangement = "b-b" AND service = "freight" AND build_date = "1967"
SELECT "prr_class" FROM "table_name_4" WHERE "1967" = "build_date" AND "b-b" = "wheel_arrangement" AND "freight" = "service"