What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? R_13(e) -> P_3(e). forall x_13: P_3(x_13) -> Q_13(x_13). R_13(e). forall x_13: Q_13(x_13) -> R_13(x_13).
exists x: R_13(x). forall x_13: P_3(x_13) -> R_13(x_13).