A girl is sitting on a rock next to a waterfall.
The girl is near a waterfall.
Sitting next to a waterfall is the same as being near a waterfall.
exists e1 x1 x2 x3.(to(e1,x3) & n_waterfall(x3) & r_next(e1) & on(e1,x2) & n_rock(x2) & Actor(e1,x1) & v_sit(e1) & n_girl(x1))
exists p1 x1.(n_girl(x1) & exists x2.(near(x1,x2) & n_waterfall(x2)))