A black dog looks through the fence at another dog.
The dogs are trying to figure out how to sniff rear ends.
A dog can look at another dog without trying to figure out how to sniff rear ends.
exists e1 s1 x1 x2 x3.(n_fence(x2) & at(e1,x3) & n_dog(x3) & -(x3 = x1) & n_dog(x1) & n_dog(x1) & through(e1,x2) & Actor(e1,x1) & v_look(e1) & a_black(s1) & Theme(s1,x1))
exists e1 p1 x1.(n_dog(x1) & Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2 s1 x2.(a_out(s1) & Manner(e2,s1) & Topic(e2,x2) & Actor(e2,x1) & v_figure(e2) & n_manner(x2) & exists e3 s2 x3 x4.(Theme(e3,x4) & Actor(e3,x3) & v_sniff(e3) & n_end(x4) & a_rear(s2) & Theme(s2,x4))))