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 reads a book, then x_5 is listening to a song. For all x_5, x_5 will read a book and x_5 is an office clerk. There is at least one x_5 for which if x_5 plays a game, then x_5 is listening to a song.
For all x_5, x_5 will read a book can be inferred via the universal simplification rule. For all x_5, x_5 is an office clerk can be inferred via the universal simplification rule.