Bolts hold the sign on the pole.
A stop sign in front of a school
Just because a sign is on a pole doesn't mean it is a stop sign or that it is in front of a school.
exists e1 x1 x2 x3.(n_pole(x3) & n_sign(x2) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_bolt(x1))
exists x1 x2 x3 x4.(a_topic(x1) & in(x1,x3) & of(x3,x4) & n_school(x4) & n_front(x3) & n_sign(x1) & of(x1,x2) & n_stop(x2))