Skier takes a steep path down the mountain.
There is snow on the ground.
While the skier is taking a steep path, there is nothing to imply that snow is on the ground.  The skier could easily be in a spot with no snow..
exists e1 s1 x1 x2 x3.(n_mountain(x3) & ne_nam_skier(x1) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & down(x2,x3) & n_path(x2) & a_steep(s1) & Theme(s1,x2))
exists p1 x1 x3.(n_ground(x3) & exists x2.((x1 = x2) & on(x2,x3) & n_snow(x2)))