What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_15, if x_15 were a soldier, then x_15 is running. For all x_15, x_15 will listen to a song if and only if x_15 will climb a mountain. For all x_15, if x_15 listens to a song, then x_15 is a nurse. For all x_15, x_15 is a nurse if and only if x_15 will go running. For all x_15, x_15 will climb a mountain or x_15 is a soldier.
For all x_15, if x_15 listens to a song, then x_15 is climbing a mountain. For all x_15, if x_15 were a nurse, then x_15 is running. For all x_15, if x_15 climbs a mountain, then x_15 is listening to a song. For all x_15, if x_15 goes running, then x_15 is a nurse.