An middle-age woman smiling while sewing.
The woman is sewing a dress for someone.
A woman sewing doesn't imply that she is sewing a dress for someone.
exists e2 e1 s1 x1 x2.(a_topic(x1) & while(e1,e2) & Actor(e2,x2) & v_sew(e2) & Actor(e1,x2) & v_smile(e1) & (x1 = x2) & n_woman(x1) & a_middle-age(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_woman(x1) & Theme(e1,x2) & Actor(e1,x1) & v_sew(e1) & for(x2,x3) & n_person(x3) & n_dress(x2))