@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_fracking_	skos:broader	isac:extraction_method_ .
isac:_bot_	skos:broader	isac:extraction_method_ .
isac:_spe_	skos:broader	isac:extraction_method_ .
isac:_method_	skos:broader	isac:extraction_method_ .
isac:_espresso_	skos:broader	isac:extraction_method_ .
isac:hydraulic_fracturing_	skos:broader	isac:extraction_method_ .
<http://webisa.webdatacommons.org/concept/supercritical+co2_extraction_>	skos:broader	isac:extraction_method_ .