A person crosses the stream in front of a waterfall.
A person is near the waterfall
A person is chasing a stream close to as waterfall.
exists e1 x1 x2 x3 x4.(n_stream(x2) & Theme(e1,x2) & Actor(e1,x1) & v_cross(e1) & in(x2,x3) & of(x3,x4) & n_waterfall(x4) & n_front(x3) & n_person(x1))
exists p1 x1 x2.(n_waterfall(x2) & near(x1,x2) & n_person(x1))