<census><person name="Bill" job="Teacher"><person name="Joe" job="Painter" spouse="Martha"><person name="Sam" job="Nurse"><person name="Fred" job="Senator" spouse="Jane"/></person><person name="Karen" job="Doctor" spouse="Steve"/></person><person name="Mary" job="Pilot"><person name="Susan" job="Pilot" spouse="Dave"/></person></person><person name="Frank" job="Writer"><person name="Martha" job="Programmer" spouse="Joe"><person name="Dave" job="Athlete" spouse="Susan"/></person><person name="John" job="Artist"><person name="Helen" job="Athlete"/><person name="Steve" job="Accountant" spouse="Karen"><person name="Jane" job="Doctor" spouse="Fred"/></person></person></person></census>
