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, if x_5 listens to a song, then x_5 is reading a book. For all x_8, x_8 is not a janitor. For all x_8, x_8 is a janitor or x_8 will listen to a song.
For all x_8, x_8 will listen to a song.