What is the PRR class of the freight train built in 1967 with a b-b wheel arrangement?
CREATE TABLE table_name_4 (
    prr_class VARCHAR,
    build_date VARCHAR,
    wheel_arrangement VARCHAR,
    service VARCHAR
)
SELECT prr_class FROM table_name_4 WHERE wheel_arrangement = "b-b" AND service = "freight" AND build_date = "1967"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the PRR class of the freight train built in 1967 with a b-b wheel arrangement? ### Input: CREATE TABLE table_name_4 (
    prr_class VARCHAR,
    build_date VARCHAR,
    wheel_arrangement VARCHAR,
    service VARCHAR
) ### Response: SELECT prr_class FROM table_name_4 WHERE wheel_arrangement = "b-b" AND service = "freight" AND build_date = "1967"