A black dog and a white dog are wrestling on the ground.
The dogs wrestle.
a black dog and a white dog are dogs
exists e1 s1 s2 x1 x2 x3 x4.(n_ground(x4) & on(e1,x4) & Actor(e1,x1) & v_wrestle(e1) & subset_of(x3,x1) & n_dog(x3) & a_white(s2) & Theme(s2,x3) & subset_of(x2,x1) & n_dog(x2) & a_black(s1) & Theme(s1,x2))
exists e1 x1.(n_dog(x1) & Actor(e1,x1) & v_wrestle(e1))