A skier performs a jumping trick on the slopes.
A skier performing a flip for an anstonished crowd.
Not all skiers that perform jumping tricks on the slopes perform tricks for an astonished crowd.
exists e1 e2 x1 x2 x3.(n_slope(x3) & Theme(e2,x2) & Actor(e2,x1) & v_perform(e2) & on(x2,x3) & n_trick(x2) & Actor(e1,x2) & v_jump(e1) & n_skier(x1))
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & for(e1,x4) & n_crowd(x4) & a_anstonished(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_perform(e1) & n_flip(x3) & (x1 = x2) & n_skier(x1))