Two large dogs greet other while their owners watch.
stray dogs are playing
The dogs cannot be playing while greeting other dogs.
exists e2 e1 p1 s1 x1 x2 x3.(Actor(e2,x1) & v_watch(e2) & while(e1,x3) & n_owner(x3) & of(x3,x1) & n_thing(x1) & exists s2.(Theme(s2,x2) & a_other(s2)) & Topic(e1,p1) & Actor(e1,x2) & v_greet(e1) & (x1 = x2) & n_dog(x1) & a_large(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 s1 x1.(Actor(e1,x1) & v_play(e1) & n_dog(x1) & a_stray(s1) & Theme(s1,x1))