What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_5, x_5 is a musician if and only if x_5 is a police officer. For all x_5, x_5 will not take a plane. For all x_5, if x_5 were a police officer, then x_5 is sleeping. For all x_5, if x_5 sleeps, then x_5 is taking a plane.
For all x_5, x_5 will not sleep. For all x_5, if x_5 were a police officer, then x_5 is taking a plane. For all x_5, if x_5 were a musician, then x_5 is a police officer. For all x_5, if x_5 were a police officer, then x_5 is a musician.