A construction worker holds a sign about bicycling.
The man is crossing guard.
Holding a sign does not make a worker a crossing guard.
exists e1 x1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_hold(e1) & about(x3,x4) & n_bicycling(x4) & n_sign(x3) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_cross(e1) & n_guard(x2))