A boy opening a present.
the boy is sleeping at home
Boy cannot be sleeping and opening something at same time.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_open(e1) & n_present(x3) & (x1 = x2) & n_boy(x1))
exists e1 x1 x2.(n_boy(x1) & at(e1,x2) & n_home(x2) & Actor(e1,x1) & v_sleep(e1))