A man is sitting down with mountains in the background.
A man stands in front of a lake.
You cannot be standing while sitting it is impossible.
exists e1 s1 x1 x2 x3.(n_background(x3) & in(e1,x3) & with(e1,x2) & n_mountain(x2) & a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 x1 x2 x3.(in(e1,x2) & of(x2,x3) & n_lake(x3) & n_front(x2) & Actor(e1,x1) & v_stand(e1) & n_man(x1))