@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_oil_	skos:broader	isac:unconventional_source_ .
isac:_coal_	skos:broader	isac:unconventional_source_ .
isac:tar_sand_	skos:broader	isac:unconventional_source_ .
isac:_shale_	skos:broader	isac:unconventional_source_ .
isac:_gas_	skos:broader	isac:unconventional_source_ .
isac:heavy_oil_	skos:broader	isac:unconventional_source_ .
isac:_deepwater_	skos:broader	isac:unconventional_source_ .
isac:_biofuel_	skos:broader	isac:unconventional_source_ .
isac:shale_gas_	skos:broader	isac:unconventional_source_ .
isac:shale_oil_	skos:broader	isac:unconventional_source_ .
isac:oil_shale_	skos:broader	isac:unconventional_source_ .
isac:oil_sand_	skos:broader	isac:unconventional_source_ .
isac:liquid_coal_	skos:broader	isac:unconventional_source_ .
isac:coal-bed_methane_	skos:broader	isac:unconventional_source_ .
isac:gas_shale_	skos:broader	isac:unconventional_source_ .
isac:tight_oil_	skos:broader	isac:unconventional_source_ .
<http://webisa.webdatacommons.org/concept/canadian+tar_sand_>	skos:broader	isac:unconventional_source_ .
<http://webisa.webdatacommons.org/concept/alberta+tar_sand_>	skos:broader	isac:unconventional_source_ .