What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_4, if x_4 listens to a song, then x_4 is poor. There is at least one x_4 for which if x_4 were poor, then x_4 is working. For all x_4, if x_4 works, then x_4 is listening to a song.
For all x_4, if x_4 works, then x_4 is poor. There is at least one x_4 for which if x_4 were poor, then x_4 is listening to a song. There is at least one x_4 for which if x_4 listens to a song, then x_4 is working.