A person is crossing the street.
The person is sleeping.
either the person is sleeping or crossing the street
exists e1 x1 x2.(n_street(x2) & Theme(e1,x2) & Actor(e1,x1) & v_cross(e1) & n_person(x1))
exists e1 x1.(n_person(x1) & Actor(e1,x1) & v_sleep(e1))