Many cameras are set up against a barricade.
The cameras are monitoring people.
Not all cameras are used for monitoring people.
exists e1 s1 x1 x2.(a_up(s1) & Manner(e1,s1) & against(e1,x2) & n_barricade(x2) & Theme(e1,x1) & v_set(e1) & n_camera(x1) & n_quantity(x1))
exists e1 x1 x2.(n_camera(x1) & Theme(e1,x2) & Actor(e1,x1) & v_monitor(e1) & n_people(x2))