Consider the following premises. There is at least one x for which if x goes running, then x is an electrician. For all x, if x were a sailor, then x is running. Can we infer the following from them? If we can, name the inference rule being used: There is at least one x for which if x were a sailor, then x is an electrician.
We can infer this via the existential transitivity rule. Therefore, the answer is yes.