What crew chief has an owner name Jack Roush and driver Greg Biffle?
CREATE TABLE table_name_12 (
    crew_chief VARCHAR,
    owner_s_ VARCHAR,
    driver_s_ VARCHAR
)
SELECT crew_chief FROM table_name_12 WHERE owner_s_ = "jack roush" AND driver_s_ = "greg biffle"
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 crew chief has an owner name Jack Roush and driver Greg Biffle? ### Input: CREATE TABLE table_name_12 (
    crew_chief VARCHAR,
    owner_s_ VARCHAR,
    driver_s_ VARCHAR
) ### Response: SELECT crew_chief FROM table_name_12 WHERE owner_s_ = "jack roush" AND driver_s_ = "greg biffle"