A wolf moves over the snow.
The wolf is old.
A wolf can be any age, young or old.
exists s1 x1 x2.(n_snow(x2) & a_topic(x1) & over(x1,x2) & n_move(x1) & a_wolf(s1) & Theme(s1,x1))
exists s1 x1.(n_wolf(x1) & Theme(s1,x1) & a_old(s1))