@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_sin_	skos:broader	isac:trig_function_ .
isac:_cos_	skos:broader	isac:trig_function_ .
isac:special_function_	skos:broader	isac:trig_function_ .