What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, x_12 will take a plane. There is at least one x_12 for which x_12 will play tennis and x_12 is a sailor. For all x_12, if x_12 takes a plane, then x_12 is reading a book.
For all x_12, x_12 will read a book. There is at least one x_12 for which x_12 will play tennis. There is at least one x_12 for which x_12 is a sailor.