The boy is surfing.
the boy is sleeping at home
the boy is either surfing or sleeping at home
exists e1 x1.(n_boy(x1) & Actor(e1,x1) & v_surf(e1))
exists e1 x1 x2.(n_boy(x1) & at(e1,x2) & n_home(x2) & Actor(e1,x1) & v_sleep(e1))