People are having a good time in the dark.
The people are on the surface of Mars
Dark and Mars are different.
exists e1 s1 x1 x2 x3.(n_dark(x3) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & in(x2,x3) & n_time(x2) & a_good(s1) & Theme(s1,x2) & n_people(x1))
exists p1 x1 x2 x3.(ne_geo_mars(x3) & n_surface(x2) & n_people(x1) & on(x1,x2) & of(x2,x3))