A black and white dog walks in the snow.
A dog is back and white.
This is correct, the dog was black and white.
exists e1 s1 s2 x1 x2.(n_snow(x2) & in(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_dog(x1) & a_white(s2) & Theme(s2,x1) & a_black(s1) & Theme(s1,x1))
exists s1 s2 x1 x2.(Theme(s2,x2) & a_white(s2) & n_dog(x2) & Theme(s1,x1) & a_back(s1) & n_dog(x1))