A kid standing in the sand at the beach.
The child is building a sand castle
Not every kid standing on the beach is building a sand castle.
exists x1 x2 x3 x4.(n_beach(x4) & n_sand(x3) & a_topic(x1) & at(x1,x4) & in(x1,x3) & n_standing(x1) & of(x1,x2) & n_kid(x2))
exists e1 x1 x2 x3.(n_child(x1) & Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_castle(x2) & of(x2,x3) & n_sand(x3))