Five people sitting in front of a body of water with the sun behind them.
The couples are watching the sunset.
The people are not necessarily couples, but could be individuals or other groupings.  If the sun is behind them it is not necessarily sunset, but could be sunrise, or another time of the day.
exists e1 x1 x2 x3 x4 x5 x6.(n_sun(x6) & a_topic(x1) & with(e1,x6) & behind(x6,x1) & n_thing(x1) & in(e1,x3) & of(x3,x4) & of(x4,x5) & n_water(x5) & n_body(x4) & n_front(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_people(x1) & card_eq_5(x1))
exists e1 x1 x2.(n_sunset(x2) & n_couple(x1) & Theme(e1,x2) & Actor(e1,x1) & v_watch(e1))