person in orange clothing lying on a wall
The prisoner is laying on a wall in the prison yard.
A person in orange clothing could be a prisoner but he does not have to be.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & on(e1,x5) & n_wall(x5) & Actor(e1,x4) & v_lie(e1) & (x1 = x4) & in(x1,x2) & n_clothing(x2) & of(x2,x3) & n_orange(x3) & n_person(x1))
exists e1 x1 x2 x3 x4.(n_yard(x3) & of(x3,x4) & n_prison(x4) & n_prisoner(x1) & in(e1,x3) & on(e1,x2) & n_wall(x2) & Actor(e1,x1) & v_lay(e1))