Koh Tonsay
During Norodom Sihanouk’s Sangkum Reastr Niyum regime ( 1953 to 1970 ) , the island was a rehabilitation center for convicted criminals , who were in turn used to defend the island . 
<triplet> Norodom Sihanouk <subj> Sangkum Reastr Niyum <obj> member of political party <triplet> Sangkum Reastr Niyum <subj> Norodom Sihanouk <obj> chairperson