What is the Plyff team that plays the Billings Outlaws?
CREATE TABLE table_name_21 (plyff VARCHAR, opponent VARCHAR)
SELECT plyff FROM table_name_21 WHERE opponent = "billings outlaws"
### Context: CREATE TABLE table_name_21 (plyff VARCHAR, opponent VARCHAR) ### Question: What is the Plyff team that plays the Billings Outlaws? ### Answer: SELECT plyff FROM table_name_21 WHERE opponent = "billings outlaws"