Men wearing orange safety vest are filling blue bags.
They are outside.
We know Men are working while filling bags, but sentence two says they are now outside.
exists e2 e1 s1 x1 x2 x3 x4 x5 x6.(Theme(e2,x6) & Actor(e2,x1) & v_fill(e2) & n_bag(x6) & a_blue(s1) & Theme(s1,x6) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_vest(x3) & of(x3,x5) & n_safety(x5) & of(x3,x4) & n_orange(x4) & (x1 = x2) & n_man(x1))
exists s1 x1.(n_thing(x1) & Theme(s1,x1) & a_outside(s1))