A lady sitting on a front porch reading a book.
A lady is reading a book.
lady siting in front  reading can also be said as lady is reading
exists e1 e2 s1 x1 x2 x3 x4 x5.(a_topic(x1) & on(e1,x3) & Theme(e2,x5) & Actor(e2,x4) & v_read(e2) & n_book(x5) & (x3 = x4) & n_porch(x3) & a_front(s1) & Theme(s1,x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_lady(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_read(e1) & n_book(x2) & n_lady(x1))