a black dog sits on the floor.
A white dog stands on the couch.
black and white are two different colors
exists e1 s1 x1 x2.(n_floor(x2) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_dog(x1) & a_black(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(n_couch(x2) & on(e1,x2) & Actor(e1,x1) & v_stand(e1) & n_dog(x1) & a_white(s1) & Theme(s1,x1))