A young kid at the beach.
The kid is building a sandcastle.
We have no idea if the kid is building a sandcastle, there are many things you can do at a beach.
exists s1 x1 x2.(n_beach(x2) & a_topic(x1) & at(x1,x2) & n_kid(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_kid(x1) & Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_sandcastle(x2))