 FACT: In Moscow people live in apartments, not in entire houses. So,  when asking for the address of the girl from the street cleaner,  Bourne should have got not only her street and house number, but the  apartment number as well. The huge condominium seen in the last  shots of Bournes stay in Moscow contains several hundred  apartments. Besides, it is highly improbable that the street cleaner  will know the new address of a person who lived there.