What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_5, x_5 will go running. For all x_5, if x_5 were rich, then x_5 is sad. For all x_5, x_5 is rich or x_5 will take a plane. For all x_5, if x_5 were sad, then x_5 is reading a book. For all x_5, if x_5 takes a plane, then x_5 is reading a book.
For all x_5, if x_5 were rich, then x_5 is reading a book.