A construction worker holds a sign about bicycling.
A worker holds a safety sign regarding where bicycle traffic should ride
The worker's sign might not concern safety or where the bicycle traffic should ride but some other message about bicycling.
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 p1 x1 x2 x3 x4 x5 x6 x7.(Time(e2,x1) & exists e3.(Actor(e3,x6) & v_ride(e3)) & Topic(e2,p1) & Actor(e2,x6) & v_should(e2) & n_traffic(x6) & of(x6,x7) & n_bicycle(x7) & Time(e1,x1) & Theme(e1,x3) & Actor(e1,x2) & v_hold(e1) & regard(x3,x5) & n_thing(x5) & n_sign(x3) & of(x3,x4) & n_safety(x4) & n_worker(x2) & n_location(x1))