What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_4, x_4 will go running. For all x_4, x_4 is not rich. There is at least one x_4 for which x_4 is rich or x_4 is a janitor.
There is at least one x_4 for which x_4 is a janitor.