Men wearing hard hats and safety vests are working.
The men are working.
men are working is same as men are working
exists e1 e2 s1 x1 x2 x3 x4 x5.(Actor(e2,x1) & v_work(e2) & subset_of(x4,x1) & n_vest(x4) & of(x4,x5) & n_safety(x5) & subset_of(x2,x1) & n_hat(x2) & a_hard(s1) & Theme(s1,x2) & Actor(e1,x2) & v_wear(e1) & of(x2,x3) & n_man(x3))
exists e1 x1.(n_man(x1) & Actor(e1,x1) & v_work(e1))