An old woman in front of an old fashioned machine with thread.
This old lady washing her cloth.
An old woman is a very general statement while This old lady is allot more specific.
exists s1 s2 s3 x1 x2 x3 x4.(a_topic(x1) & with(x1,x4) & n_thread(x4) & in(x1,x2) & of(x2,x3) & n_machine(x3) & a_fashioned(s3) & Theme(s3,x3) & a_old(s2) & Theme(s2,x3) & n_front(x2) & n_woman(x1) & a_old(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(n_cloth(x3) & of(x3,x1) & n_female(x1) & n_lady(x1) & a_old(s1) & Theme(s1,x1) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_wash(e1) & (x1 = x2))