A man stands on a mountain overlooking trees and a lake.
The man is on flat ground.
One can not be on a mountain and on flat ground simultaneously.
exists e1 e2 x1 x2 x3 x4 x5.(on(e1,x2) & subset_of(x5,x2) & n_lake(x5) & subset_of(x3,x2) & n_tree(x3) & Actor(e2,x3) & v_overlook(e2) & of(x3,x4) & n_mountain(x4) & Actor(e1,x1) & v_stand(e1) & n_man(x1))
exists p1 x1.(n_man(x1) & exists s1 x2.(on(x1,x2) & n_ground(x2) & a_flat(s1) & Theme(s1,x2)))