People are watching while a construction crew builds a bridge.
The bridge is red.
Not all bridges are red.
exists e1 p1 x1.(exists e2 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x2) & v_build(e2) & n_bridge(x4) & n_crew(x2) & of(x2,x3) & n_construction(x3)) & while(e1,p1) & Actor(e1,x1) & v_watch(e1) & n_people(x1))
exists s1 x1.(n_bridge(x1) & Theme(s1,x1) & a_red(s1))