Lighthouse in a wooded area sits above tree's.
The lighthouse was in the middle of a barren desert.
Either the lighthouse is in a wooded area or in the middle of a barren desert. It cannot be both at the same time.
exists e1 s1 x1 x2 x3 x4.(above(e1,x3) & n_'s(x3) & of(x3,x4) & n_tree(x4) & Actor(e1,x1) & v_sit(e1) & in(x1,x2) & n_area(x2) & a_wooded(s1) & Theme(s1,x2) & n_lighthouse(x1))
exists p1 x1 x2.(n_middle(x2) & n_lighthouse(x1) & exists s1 x3.(in(x1,x2) & of(x2,x3) & n_desert(x3) & a_barren(s1) & Theme(s1,x3)))