What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_1 for which x_1 is not a police officer. For all x_1, x_1 is poor. For all x_1, x_1 is a police officer or x_1 is an electrician. For all x_1, x_1 is a janitor.
There is at least one x_1 for which x_1 is an electrician. For all x_1, x_1 is poor and x_1 is a janitor. For all x_1, x_1 is a janitor and x_1 is poor.