Two dogs in the snow.
Two black dogs in the snow.
The two dogs might not be black.
exists x1 x2.(n_snow(x2) & a_topic(x1) & in(x1,x2) & n_dog(x1) & card_eq_2(x1))
exists s1 x1 x2.(n_snow(x2) & a_topic(x1) & in(x1,x2) & n_dog(x1) & a_black(s1) & Theme(s1,x1) & card_eq_2(x1))