Translate the following inference to logic notation: For all x, if x_13 sleeps, then x_13 is an electrician. For all x, x_13 will sleep. For all x, x_13 will read a book. There is at least one x for which if x_13 were an electrician, then x_13 is listening to a song. Therefore there is at least one x for which x_13 will read a book.
forall x: P(x) -> Q(x). forall x: P(x). forall x: R(x). exists x: Q(x) -> S(x). Therefore exists x: R(x).