@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:sleep_deprivation_	skos:broader	isac:interrogation_method_ .
isac:_waterboarding_	skos:broader	isac:interrogation_method_ .
isac:_water-boarding_	skos:broader	isac:interrogation_method_ .