A dog jumping over a hurdle.
A dog practicing for a competiton.
The dog could be jumping over a hurdle without actually practicing for a competition.
exists e1 x1 x2 x3.(a_topic(x1) & over(e1,x3) & n_hurdle(x3) & Actor(e1,x2) & v_jump(e1) & (x1 = x2) & n_dog(x1))
exists x1 x2 x3.(a_topic(x1) & for(x1,x3) & n_competiton(x3) & n_practicing(x1) & of(x1,x2) & n_dog(x2))