Men in orange vests and white hard hats stand on scaffolds working.
Men stand on scaffolds while working.
men stand on scaffolds working is the same as men stand on scaffolds working.
exists e2 e1 s1 s2 x1 x2 x3 x4 x5 x6.(for(e1,e2) & Actor(e2,x1) & v_work(e2) & on(e1,x6) & n_scaffold(x6) & Actor(e1,x1) & v_stand(e1) & in(x1,x2) & n_hat(x5) & a_hard(s2) & Theme(s2,x5) & a_white(s1) & Theme(s1,x5) & n_vest(x4) & subset_of(x5,x2) & subset_of(x4,x2) & of(x2,x3) & n_orange(x3) & n_man(x1))
exists e2 e1 x1 x2.(while(e1,e2) & Actor(e2,x1) & v_work(e2) & on(e1,x2) & n_scaffold(x2) & Actor(e1,x1) & v_stand(e1) & n_man(x1))