Two kids on camel back in desert
the kid rode a horse
When you're riding on camel back, you're not riding a horse.
exists x1 x2 x3 x4.(a_topic(x1) & on(x1,x2) & in(x3,x4) & n_desert(x4) & back(x2,x3) & n_thing(x3) & n_camel(x2) & n_kid(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_kid(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_horse(x2))