A smiling woman who is sewing on a machine.
The sewing machine works.
The implications is that when a woman sews on a sewing machine that works it makes her smile. If a woman is sewing it implies that the machine works.
exists e2 e1 x1 x2 x3.(a_topic(x1) & on(e2,x3) & n_machine(x3) & Actor(e2,x2) & v_sew(e2) & (x1 = x2) & n_woman(x1) & Actor(e1,x1) & v_smile(e1))
exists e1 x1 x2.(n_work(x1) & of(x1,x2) & n_machine(x2) & Actor(e1,x1) & v_sew(e1) & a_topic(x1))