A dog playing with his ball in the wading pool.
A dog plays with a frisbee in some grass.
a dog can either play with the frisbee or a ball but not both at the same time
exists e1 x1 x2 x3 x4.(n_pool(x4) & Actor(e1,x4) & v_wade(e1) & a_topic(x1) & with(x1,x3) & in(x3,x4) & n_ball(x3) & of(x3,x1) & n_male(x1) & n_playing(x1) & of(x1,x2) & n_dog(x2))
exists e1 x1 x2 x3.(with(e1,x2) & in(x2,x3) & n_grass(x3) & n_frisbee(x2) & Actor(e1,x1) & v_play(e1) & n_dog(x1))