A group of women sitting around a table for lunch.
A group of friends meets for lunch.
the fact that the woman are sitting around a lunch table does not imply that they are friends.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & of(x1,x2) & for(e1,x5) & n_lunch(x5) & around(e1,x4) & n_table(x4) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_woman(x2) & n_group(x1))
exists e1 x1 x2 x3.(for(e1,x3) & n_lunch(x3) & Actor(e1,x1) & v_meet(e1) & of(x1,x2) & n_friend(x2) & n_group(x1))