How can countries ensure cultural repatriation?

Museums around the world are returning artefacts to their countries of origin. One in London has sent back its entire collection of Benin Bronzes to Nigeria's government. So,  how can other countries ensure their cultural treasures are given back, and be displayed for generations to come? Join host Adrian Finighan. Guests: Barnaby Phillips - Author. Dr. Jos van Beurden - Senior Researcher at Free University, Amsterdam. Luigi Prada - Professor of Egyptology, Uppsala University.