Many guards are standing in front of the starting line of a race.
The guards are sleeping in a bell tower.
The guards standing cannot be the ones sleeping.
exists e2 e1 x1 x2 x3 x4.(n_line(x3) & Actor(e2,x3) & v_start(e2) & in(e1,x2) & of(x2,x3) & of(x3,x4) & n_race(x4) & n_front(x2) & Actor(e1,x1) & v_stand(e1) & n_guard(x1) & n_quantity(x1))
exists e1 x1 x2 x3.(n_guard(x1) & in(e1,x2) & n_tower(x2) & of(x2,x3) & n_bell(x3) & Actor(e1,x1) & v_sleep(e1))