A dog in a field.
A dog is playing
There is no information to indicate that the dog is playing - it could just be sitting in the field.
exists x1 x2.(a_topic(x1) & in(x1,x2) & n_field(x2) & n_dog(x1))
exists e1 x1.(Actor(e1,x1) & v_play(e1) & n_dog(x1))