What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: For all z_4, if z_4 listens to a song, then z_4 is an artist. For all z_4, if z_4 were poor, then z_4 is listening to a song. For all z_4, if z_4 were an artist, then z_4 is poor.
For all z_4, if z_4 listens to a song, then z_4 is poor can be inferred via the universal transitivity rule. For all z_4, if z_4 were poor, then z_4 is an artist can be inferred via the universal transitivity rule. For all z_4, if z_4 were an artist, then z_4 is listening to a song can be inferred via the universal transitivity rule.