@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_sun_	skos:broader	isac:binary_star_ .
isac:_algol_	skos:broader	isac:binary_star_ .
isac:_sirius_	skos:broader	isac:binary_star_ .
isac:alpha_centauri_	skos:broader	isac:binary_star_ .