A woman who is ski-ing poses for the camera.
A woman is a model posing for the camera.
Not all women who pose for a camera is a model.
exists p1 x1 x2 x4.(n_camera(x4) & a_topic(x1) & exists s1 x3.((x2 = x3) & for(x3,x4) & n_pose(x3) & a_ski-ing(s1) & Theme(s1,x3)) & (x1 = x2) & n_woman(x1))
exists p1 x1 x4.(n_camera(x4) & exists e1 x2 x3.((x1 = x2) & for(e1,x4) & Actor(e1,x3) & v_pose(e1) & (x2 = x3) & n_model(x2)) & n_woman(x1))