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 were a sailor, then x_5 is working. For all x_5, x_5 is an office clerk. For all x_5, if x_5 were an office clerk, then x_5 is a sailor. For all x_5, if x_5 works, then x_5 is listening to a song.
For all x_5, x_5 is a sailor. For all x_5, if x_5 were a sailor, then x_5 is listening to a song. For all x_5, if x_5 were an office clerk, then x_5 is working.