A man stands on top of a brick structure as another man looks on.
A man stands on top of a chimney looking down on his friend
The brick structure is not necessarily a chimney.The two men are not necessarily a friend to each other.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7.(on(e2,x7) & n_thing(x7) & Actor(e2,x1) & v_look(e2) & on(e1,x4) & of(x4,x5) & n_structure(x5) & of(x5,x6) & n_brick(x6) & n_top(x4) & as(e1,x3) & n_man(x3) & -(x3 = x1) & n_man(x1) & n_man(x1) & Actor(e1,x2) & v_stand(e1) & (x1 = x2))
exists e1 e2 s1 x1 x2 x3 x4.(for(e1,e2) & a_down(s1) & Manner(e2,s1) & on(e2,x4) & n_friend(x4) & of(x4,x1) & n_male(x1) & Actor(e2,x1) & v_look(e2) & on(e1,x2) & of(x2,x3) & n_chimney(x3) & n_top(x2) & Actor(e1,x1) & v_stand(e1) & n_man(x1))