A black and white dog stands neck deep in clear water.
no animals.
either there can be a black and white dog or no animals.
exists e1 s1 s2 s3 x1 x2 x3 x4.(in(e1,x4) & n_water(x4) & a_clear(s3) & Theme(s3,x4) & Time(e1,x3) & n_neck(x3) & Time(e1,x2) & n_deep(x2) & Actor(e1,x1) & v_stand(e1) & n_dog(x1) & a_white(s2) & Theme(s2,x1) & a_black(s1) & Theme(s1,x1))
-exists x1.(a_topic(x1) & n_animal(x1))