Women shopping for purses.
Women are shopping for a dress.
Purses and dresses are not the same thing.
exists x1 x2 x3.(a_topic(x1) & for(x1,x3) & n_purse(x3) & n_shopping(x1) & (x1 = x2) & ne_nam_women(x2))
exists e1 x1 x2.(for(e1,x2) & n_dress(x2) & Actor(e1,x1) & v_shop(e1) & n_woman(x1))