A woman is wearing a sash while waving.
The woman is a contestant.
Just because some is wearing a sash does not mean they are a contestant.
exists e2 e1 x1 x2.(while(e1,e2) & Actor(e2,x1) & v_wave(e2) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_sash(x2) & n_woman(x1))
exists p1 x1.(n_woman(x1) & exists x2.((x1 = x2) & n_contestant(x2)))