@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_greenhouse_	skos:broader	isac:protective_structure_ .
isac:_shell_	skos:broader	isac:protective_structure_ .
isac:_wall_	skos:broader	isac:protective_structure_ .
isac:_tent_	skos:broader	isac:protective_structure_ .
isac:_levee_	skos:broader	isac:protective_structure_ .
isac:_guardrail_	skos:broader	isac:protective_structure_ .
isac:_cocoon_	skos:broader	isac:protective_structure_ .
isac:_seawall_	skos:broader	isac:protective_structure_ .
isac:high_tunnel_	skos:broader	isac:protective_structure_ .