A happy girl in a forest with leaves falling from a tree.
A girl in a forest.
A forest of full of trees.  If the girl is surrounded by trees, she would be in a forest.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x2) & with(x2,x3) & from(e1,x5) & n_tree(x5) & Actor(e1,x4) & v_fall(e1) & (x3 = x4) & n_leaf(x3) & n_forest(x2) & n_girl(x1) & a_happy(s1) & Theme(s1,x1))
exists x1 x2.(a_topic(x1) & in(x1,x2) & n_forest(x2) & n_girl(x1))