A competitor does a pole vault.
This man is training for hurdles.
One cannot be doing a pole vault and training for the hurdles at once.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_vault(x2) & of(x2,x3) & n_pole(x3) & n_competitor(x1))
exists e1 x1 x2.(n_man(x1) & for(e1,x2) & n_hurdle(x2) & Actor(e1,x1) & v_train(e1))