Two children walk down a path into the woods.
Two boys stumble upon a large log on a path.
Children not be boys only and they need not always stumble upon a large log while walking into the woods.
exists e1 x1 x2 x3.(n_wood(x3) & into(e1,x3) & down(e1,x2) & n_path(x2) & Actor(e1,x1) & v_walk(e1) & n_child(x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3.(upon(e1,x2) & on(x2,x3) & n_path(x3) & n_log(x2) & a_large(s1) & Theme(s1,x2) & Actor(e1,x1) & v_stumble(e1) & n_boy(x1) & card_eq_2(x1))