Someone is looking out their window watching the mailman deliver their mail and drive on to the next house.
An old lady looks out the window and sees the mailman.
Someone is looking out their window watching the mailman deliver their mail and drive on to the next house does not indicate that  An old lady looks out the window and sees the mailman.
exists e2 e1 p1 s1 x1 x2 x3 x4 x5 x6 x7 x8.(n_house(x8) & a_next(s1) & Theme(s1,x8) & n_mailman(x4) & out(e1,x2) & exists e3.(r_on(e3) & to(e3,x8) & Theme(e3,x5) & Actor(e3,x4) & v_deliver(e3)) & n_drive(x7) & n_mail(x6) & subset_of(x7,x5) & subset_of(x6,x5) & of(x5,x1) & n_thing(x1) & n_thing(x1) & Recipient(e2,p1) & Actor(e2,x3) & Topic(e2,x4) & v_watch(e2) & (x2 = x3) & n_window(x2) & of(x2,x1) & Actor(e1,x1) & v_look(e1) & n_person(x1))
exists e2 e1 s1 s2 s3 x1 x2 x3 x4.(n_mailman(x4) & n_window(x2) & Theme(e2,x4) & Actor(e2,x3) & v_see(e2) & n_lady(x3) & a_old(s3) & Theme(s3,x3) & a_out(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_look(e1) & n_lady(x1) & a_old(s1) & Theme(s1,x1))