What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_6 for which if x_6 plays squash, then x_6 is driving a car. For all x_6, if x_6 drives a car, then x_6 is taking a plane. For all x_6, if x_6 plays tennis, then x_6 is climbing a mountain. For all x_6, if x_6 takes a plane, then x_6 is playing tennis.
For all x_6, if x_6 drives a car, then x_6 is playing tennis. For all x_6, if x_6 takes a plane, then x_6 is climbing a mountain. There is at least one x_6 for which if x_6 plays squash, then x_6 is taking a plane.