This is a grassy and rocky place.
This area has rocks and grass.
A grassy place has grass and a rocky place has rocks.
exists p1 x1.(n_thing(x1) & exists s1 x2 x3 x4.((x1 = x2) & subset_of(x4,x2) & n_place(x4) & a_rocky(s1) & Theme(s1,x4) & subset_of(x3,x2) & n_grassy(x3)))
exists e1 x1 x2 x3 x4.(n_area(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & subset_of(x4,x2) & n_grass(x4) & subset_of(x3,x2) & n_rock(x3))