Four boys are sitting on a wall.
the kids eat at home
The kids are either sitting on a wall or eating at home.
exists e1 x1 x2.(on(e1,x2) & n_wall(x2) & Actor(e1,x1) & v_sit(e1) & n_boy(x1) & card_eq_4(x1))
exists e1 x1 x2.(n_kid(x1) & at(e1,x2) & n_home(x2) & Actor(e1,x1) & v_eat(e1))