Bolts hold the sign on the pole.
The sign is mounted to the school
The sign is either on the pole or mounted to the 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 e1 x1 x2.(n_school(x2) & n_sign(x1) & to(e1,x2) & Theme(e1,x1) & v_mount(e1))