Men working with large machinery.
The men are wearing hard hats
Just because the men are working with machinery does not mean they are wearing hard hats.
exists e1 s1 x1 x2 x3.(a_topic(x1) & with(e1,x3) & n_machinery(x3) & a_large(s1) & Theme(s1,x3) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_man(x1))
exists e1 s1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_hat(x2) & a_hard(s1) & Theme(s1,x2))