A dog jumps of a surfboard
A surfboard jumps off of a dog
Dog and surfboard are different things. They cannot jumps each other at the same time.
exists x1 x2 x3.(a_topic(x1) & of(x1,x3) & n_surfboard(x3) & n_jump(x1) & of(x1,x2) & n_dog(x2))
exists e1 x1 x2.(r_off(e1) & of(e1,x2) & n_dog(x2) & Actor(e1,x1) & v_jump(e1) & n_surfboard(x1))