What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_9, if x_9 drives a car, then x_9 is sleeping. For all x_9, x_9 will take a plane. For all x_9, if x_9 takes a plane, then x_9 is driving a car. For all x_9, if x_9 were a bartender, then x_9 is sleeping.
For all x_9, x_9 will drive a car. For all x_9, if x_9 takes a plane, then x_9 is sleeping.