Silhouettes of people in dark place
a couple was there
If a couple was there, there would have to be silhouettes of people.
exists s1 x1 x2 x3.(a_topic(x1) & of(x1,x2) & in(x2,x3) & n_place(x3) & a_dark(s1) & Theme(s1,x3) & n_people(x2) & n_silhouette(x1))
exists s1 x1.(Theme(s1,x1) & a_there(s1) & n_couple(x1))