A man and woman are having a conversation while sitting on a tree stump in the woods.
They are in the cabin of an airplane.
THere can be no tree stump on an airplane.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7.(n_wood(x7) & while(e1,e2) & in(e2,x7) & on(e2,x5) & n_stump(x5) & of(x5,x6) & n_tree(x6) & Actor(e2,x1) & v_sit(e2) & Theme(e1,x4) & Actor(e1,x1) & v_have(e1) & n_conversation(x4) & n_woman(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1))
exists p1 x1 x2.(n_cabin(x2) & n_thing(x1) & exists x3.(in(x1,x2) & of(x2,x3) & n_airplane(x3)))