CREATE TABLE table_name_12 (crew_chief VARCHAR, owner_s_ VARCHAR, driver_s_ VARCHAR)

What crew chief has an owner name Jack Roush and driver Greg Biffle?
SELECT crew_chief FROM table_name_12 WHERE owner_s_ = "jack roush" AND driver_s_ = "greg biffle"
SELECT "crew_chief" FROM "table_name_12" WHERE "driver_s_" = "greg biffle" AND "jack roush" = "owner_s_"