Sentence:  Included in this figure, since the fall of South Vietnam in 1975, are over 250,000 boat people and 250,000 other civilians who were either ruthlessly murdered outright or who perished in communist <WSD>death camps</WSD> set up to "re-educate" non-communists. 
Meaning of the word marked with <WSD> tags:  A prison camp in which a large number of prisoners die for various reasons, such as starvation, disease, brutality and neglect.