a skier helping a fellow skier get up from the snow
A ski instructor is tanning.
One cannot get up from snow and tanning at the same time.
exists e2 e1 p1 s1 x1 x2 x3 x4.(n_snow(x4) & exists s2.(from(s2,x4) & Theme(s2,x1) & a_up(s2)) & Topic(e2,p1) & Actor(e2,x1) & v_get(e2) & Theme(e1,x3) & Actor(e1,x2) & v_help(e1) & n_skier(x3) & a_fellow(s1) & Theme(s1,x3) & (x1 = x2) & n_skier(x1))
exists e1 x1 x2.(Actor(e1,x1) & v_tan(e1) & n_instructor(x1) & of(x1,x2) & n_ski(x2))