A boy does a cartwheel on a rock cliff.
The boy is training for sports near the cliff.
Just because a boy does a cartwheel on a rock cliff doesn't imply he is training for sports.
exists e1 x1 x2 x3 x4.(on(e1,x3) & n_cliff(x3) & of(x3,x4) & n_rock(x4) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_cartwheel(x2) & n_boy(x1))
exists e1 x1 x2 x3.(n_cliff(x3) & n_boy(x1) & for(e1,x2) & near(x2,x3) & n_sport(x2) & Actor(e1,x1) & v_train(e1))