A woman is walking past an artificial waterfall.
There is a woman outside.
A woman is walking past an artificial waterfall but not outside.
exists e1 s1 x1 x2.(past(e1,x2) & n_waterfall(x2) & a_artificial(s1) & Theme(s1,x2) & Actor(e1,x1) & v_walk(e1) & n_woman(x1))
exists p1 x1 x2 x3.((x1 = x2) & n_outside(x2) & of(x2,x3) & n_woman(x3))