Two men viewing a passing cruise ship.
Two men watch the ocean with no ships.
If there are no ships on the ocean, a cruise ship cannot exist.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_view(e1) & n_ship(x3) & of(x3,x5) & n_cruise(x5) & of(x3,x4) & n_passing(x4) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists x1 x2.(n_ocean(x2) & -exists e1 x3.(Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & with(x2,x3) & n_ship(x3)) & n_man(x1) & card_eq_2(x1))