Four people watch the sunset.
Four people enjoy the sun setting.
Sun setting is another way of saying sunset.
exists e1 x1 x2.(n_sunset(x2) & Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_people(x1) & card_eq_4(x1))
exists e1 x1 x2 x3.(n_setting(x2) & of(x2,x3) & n_sun(x3) & Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & n_people(x1) & card_eq_4(x1))