A dog runs in a grassy field.
A pet is sitting on the couch.
Sitting can't happen while running. Grassy fields can't be on couches.
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.(n_couch(x2) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_pet(x1))