A couple walk their Dachshund past a wall with graffiti on it.
A couple at home alone.
Walls inside homes don't have graffiti on them and a couple at home alone cannot be walking past a wall outside.
exists e1 x1 x2 x3 x4.(past(e1,x3) & on(x3,x1) & n_thing(x1) & n_thing(x1) & with(x3,x4) & n_graffitus(x4) & n_wall(x3) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_dachshund(x2) & of(x2,x1) & n_couple(x1))
exists x1 x2.(a_topic(x1) & r_alone(x1) & at(x1,x2) & n_home(x2) & n_couple(x1))