A woman walks down a city sidewalk at night.
The sky is dark.
The sky is always dark at night.
exists e1 s1 x1 x2 x3 x4.(at(e1,x4) & n_night(x4) & a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_sidewalk(x2) & of(x2,x3) & n_city(x3) & n_woman(x1))
exists s1 x1.(n_sky(x1) & Theme(s1,x1) & a_dark(s1))