@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_drug_	skos:broader	isac:additional_intervention_ .
isac:_hospitalization_	skos:broader	isac:additional_intervention_ .
isac:surgical_treatment_	skos:broader	isac:additional_intervention_ .
isac:_pitocin_	skos:broader	isac:additional_intervention_ .