Skiiers on snow cappedhills
Skiiers are doing jumping jacks.
Skiers skiing on snow capped hills cannot be doing jumping jacks.
exists x1 x2 x3.(a_topic(x1) & on(x1,x2) & n_cappedhill(x2) & of(x2,x3) & n_snow(x3) & n_skiier(x1))
exists e2 e1 x1 x2.(Theme(e2,x2) & Actor(e2,x1) & v_do(e2) & n_jack(x2) & Actor(e1,x2) & v_jump(e1) & n_skiier(x1))