A man sits perched in a tree.
The man is on the ground.
A man is either in a tree or on the ground.
exists e1 p1 x1.(exists e2 x2.(in(e2,x2) & n_tree(x2) & Theme(e2,x1) & v_perch(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists p1 x1 x2.(n_ground(x2) & n_man(x1) & on(x1,x2))