A skier poses for a picture on top of a mountain.
A skier is posing with his instructor on the mountain.
The picture was never described to be with his instructor
exists e1 x1 x2 x3 x4.(for(e1,x2) & on(x2,x3) & of(x3,x4) & n_mountain(x4) & n_top(x3) & n_picture(x2) & Actor(e1,x1) & v_pose(e1) & n_skier(x1))
exists e1 x1 x2 x3.(n_mountain(x3) & with(e1,x2) & on(x2,x3) & n_instructor(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_pose(e1) & n_skier(x1))