A construction worker holds a sign about bicycling.
A construction worker stands holding a sign.
A worker who stands or a worker who sits could hold a sign.
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 e2 x1 x2 x3.(for(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_hold(e2) & n_sign(x3) & Actor(e1,x1) & v_stand(e1) & n_worker(x1) & of(x1,x2) & n_construction(x2))