A waterskier flies into the air.
A waterskier is performing an awesome trick.
A waterskier who flies into the air is not necessarily performing an awesome trick.
exists e1 x1 x2.(n_air(x2) & into(e1,x2) & Actor(e1,x1) & v_fly(e1) & n_waterskier(x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_trick(x2) & a_awesome(s1) & Theme(s1,x2) & n_waterskier(x1))