Children look through a fence.
Children are looking through the cracks of a fence.
When kids look through a fence they're looking through it.
exists e1 x1 x2.(through(e1,x2) & n_fence(x2) & Actor(e1,x1) & v_look(e1) & n_child(x1))
exists e1 x1 x2 x3.(n_crack(x2) & through(e1,x2) & of(x2,x3) & n_fence(x3) & Actor(e1,x1) & v_look(e1) & n_child(x1))