Four men waiting in a area, holding ladders.
Four men don't know anything.
If they don't know anything, they wouldn't be holding ladders, since it implies they are doing something,
exists e2 e1 x1 x2 x3 x4 x5.(a_topic(x1) & in(e1,x3) & Theme(e2,x5) & Actor(e2,x4) & v_hold(e2) & n_ladder(x5) & (x3 = x4) & n_area(x3) & Actor(e1,x2) & v_wait(e1) & (x1 = x2) & n_man(x1) & card_eq_4(x1))
exists x1.(-all x2.(n_thing(x2) -> exists e1.(Theme(e1,x2) & Actor(e1,x1) & v_know(e1))) & n_man(x1) & card_eq_4(x1))