A dog running in a field.
A dog is running to catch a ball.
A dog can run in a field without trying to catch a ball
exists e1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_field(x3) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & n_dog(x1))
exists e1 p1 x1 x2.(Topic(e1,p1) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_catch(e2) & n_ball(x3)) & Actor(e1,x2) & v_run(e1) & n_dog(x2) & n_dog(x1))