What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? S_17(a_17) -> w. w -> r_8. forall x_17: R_17(x_17) -> S_17(x_17). r_8 -> R_17(a_17).
S_17(a_17) -> r_8. w -> R_17(a_17).