A dog runs in a grassy field.
A dog sitting on a porch.
Sitting can't happen while running. Grassy fields can't be on a porch.
exists e1 s1 x1 x2.(in(e1,x2) & n_field(x2) & a_grassy(s1) & Theme(s1,x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1))
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_porch(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_dog(x1))