A dog is nipping at the ear of another dog on a leash, in a park.
The larger dog is nipping at a smaller dog.
A dog nipping at another dog doesn't mean the larger dog is nipping.
exists e1 x1 x2 x3 x4 x5.(n_ear(x2) & in(e1,x5) & n_park(x5) & at(e1,x2) & of(x2,x3) & on(x3,x4) & n_leash(x4) & n_dog(x3) & -(x3 = x1) & n_dog(x1) & n_dog(x1) & Actor(e1,x1) & v_nip(e1))
exists e1 s1 s2 x1.(at(e1,x1) & n_dog(x1) & n_dog(x1) & r_more(s2) & a_smaller(s2) & Theme(s2,x1) & Actor(e1,x1) & v_nip(e1) & r_more(s1) & a_large(s1) & Theme(s1,x1))