A mountain climber scales a steep rock face.
A mountain climber is burying his face in the sand.
If one scales a rock, one is not burying his face in sand.
exists e1 s1 x1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_scale(e1) & n_face(x3) & of(x3,x4) & n_rock(x4) & a_steep(s1) & Theme(s1,x3) & n_climber(x1) & of(x1,x2) & n_mountain(x2))
exists e1 x1 x2 x3 x4.(n_sand(x4) & in(e1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_bury(e1) & n_face(x3) & of(x3,x1) & n_male(x1) & n_climber(x1) & of(x1,x2) & n_mountain(x2))