Several men in hard hats are operating a giant pulley system.
These men are construction workers.
Not all men are construction workers.
exists e1 s1 s2 s3 x1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_operate(e1) & n_system(x3) & of(x3,x4) & n_pulley(x4) & a_giant(s3) & Theme(s3,x3) & in(x1,x2) & n_hat(x2) & a_hard(s2) & Theme(s2,x2) & n_man(x1) & a_several(s1) & Theme(s1,x1))
exists p1 x1.(n_man(x1) & exists x2 x3.((x1 = x2) & n_worker(x2) & of(x2,x3) & n_construction(x3)))