There are trees with no leaves in the background.
The trees are dead
Just because a tree has no leaves does not mean it is dead.
exists p1 x1 x4.(n_background(x4) & exists x2.(-exists x3.((x1 = x2) & with(x2,x3) & in(x3,x4) & n_leaf(x3)) & n_tree(x2)))
exists s1 x1.(n_tree(x1) & Theme(s1,x1) & a_dead(s1))