What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all z, if z sleeps, then z is running. For all z, if z were a sailor, then z is a politician. There is at least one z for which if z goes running, then z is a sailor. For all z, z is an electrician if and only if z will sleep.
There is at least one z for which if z goes running, then z is a politician. There is at least one z for which if z sleeps, then z is a sailor. For all z, if z were an electrician, then z is sleeping. For all z, if z sleeps, then z is an electrician.