Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_12 (crew_chief VARCHAR, owner_s_ VARCHAR, driver_s_ VARCHAR)
### Question:
What crew chief has an owner name Jack Roush and driver Greg Biffle?
### Answer:
SELECT crew_chief FROM table_name_12 WHERE owner_s_ = "jack roush" AND driver_s_ = "greg biffle"