A blond boy slides down a sand dune on a skateboard with no wheels.
A boy is in a desert.
You can not infer he is in the desert.
exists s1 x1 x2 x3 x4.(-exists e1 s2 x5.(a_down(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_slide(e1) & on(x2,x4) & with(x4,x5) & n_wheel(x5)) & n_skateboard(x4) & n_dune(x2) & of(x2,x3) & n_sand(x3) & n_boy(x1) & a_blond(s1) & Theme(s1,x1))
exists p1 x1.(exists x2.(in(x1,x2) & n_desert(x2)) & n_boy(x1))