What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: For all x_5, if x_5 goes running, then x_5 is excited. For all x_5, if x_5 were an electrician, then x_5 is running. For all x_5, x_5 is an electrician or x_5 is a taxi driver. For all x_5, if x_5 were a taxi driver, then x_5 is excited.
For all x_5, if x_5 were an electrician, then x_5 is excited can be inferred via the universal transitivity rule.