@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_pressure_	skos:broader	isac:external_variable_ .
isac:_moisture_	skos:broader	isac:external_variable_ .
isac:_temperature_	skos:broader	isac:external_variable_ .
isac:_weather_	skos:broader	isac:external_variable_ .
isac:_distance_	skos:broader	isac:external_variable_ .
isac:_technology_	skos:broader	isac:external_variable_ .
isac:_knowledge_	skos:broader	isac:external_variable_ .