What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_6, x_6 is excited or x_6 will sleep. For all x_6, x_6 is a musician or x_6 will not sleep. For all x_6, x_6 is a janitor. For all x_6, if x_6 were excited, then x_6 is a musician.
For all x_6, if x_6 sleeps, then x_6 is a musician.