a gray dog walking on a leash in some grass
A dog is in the grass.
A dog may be referring to the gray dog.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & in(e1,x4) & n_grass(x4) & on(e1,x3) & n_leash(x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_dog(x1) & a_gray(s1) & Theme(s1,x1))
exists p1 x1 x2.(n_grass(x2) & in(x1,x2) & n_dog(x1))