A child hiding behind a post.
The child is hiding.
Is hiding is a restatement of hiding.
exists e1 x1 x2 x3.(a_topic(x1) & behind(e1,x3) & n_post(x3) & Actor(e1,x2) & v_hide(e1) & (x1 = x2) & n_child(x1))
exists e1 x1.(n_child(x1) & Actor(e1,x1) & v_hide(e1))