Sightseers look across the water at a city.
There is water between the city and the sightseers.
If sightseers must look across the water to see a city, there must be water between them and the city.
exists e1 x1 x2 x3.(n_water(x3) & across(e1,x3) & at(e1,x2) & n_city(x2) & Actor(e1,x1) & v_look(e1) & n_sightseer(x1))
exists p1 x1 x4 x5.(n_sightseer(x5) & n_city(x4) & exists x2 x3.((x1 = x2) & between(x2,x3) & subset_of(x5,x3) & subset_of(x4,x3) & n_water(x2)))