Two boys are standing on sand next to an overturned chair.
An Arabian horse prances to the top of a sand dune.
Two boys refers to people and cannot be an Arabian horse, which is an animal.
exists e1 s1 x1 x2 x3.(to(e1,x3) & n_chair(x3) & a_overturned(s1) & Theme(s1,x3) & r_next(e1) & on(e1,x2) & n_sand(x2) & Actor(e1,x1) & v_stand(e1) & n_boy(x1) & card_eq_2(x1))
exists s1 x1 x2 x3 x4 x5.(n_top(x3) & a_topic(x1) & to(x1,x3) & of(x3,x4) & n_dune(x4) & of(x4,x5) & n_sand(x5) & n_prance(x1) & of(x1,x2) & n_horse(x2) & a_arabian(s1) & Theme(s1,x1))