Men wearing hard hats and safety vests are working.
Men are working and wearing safety gear.
Nothing explains that the hard hats the men are wearing are considered safety gear.
exists e2 e1 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 e2 e1 x1 x2 x3 x4.(Theme(e2,x3) & Actor(e2,x2) & v_wear(e2) & n_gear(x3) & of(x3,x4) & n_safety(x4) & n_man(x2) & Actor(e1,x1) & v_work(e1) & n_man(x1))