A woman is waterskiing while being photographed by some men.
A professional model is being captured while waterskiing.
Not all woman is professional model.
exists e1 e2 x1 x2.(while(e1,e2) & Actor(e2,x2) & n_man(x2) & Theme(e2,x1) & v_photograph(e2) & Actor(e1,x1) & v_waterskie(e1) & n_woman(x1))
exists e1 e2 s1 x1.(while(e1,e2) & Actor(e2,x1) & v_waterskie(e2) & Theme(e1,x1) & v_capture(e1) & n_model(x1) & a_professional(s1) & Theme(s1,x1))