A dog running fast with ears flying.
The dog is chasing a ball.
Just because a dog is running does not mean the dog is chasing a ball.
exists e1 e2 s1 x1 x2 x3.(a_topic(x1) & Actor(e2,x3) & v_fly(e2) & with(e1,x3) & n_ear(x3) & a_fast(s1) & Manner(e1,s1) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & n_dog(x1))
exists e1 x1 x2.(n_dog(x1) & Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_ball(x2))