@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_means_	skos:broader	isac:central_controller_ .
isac:_system_	skos:broader	isac:central_controller_ .
isac:_timing_	skos:broader	isac:central_controller_ .
isac:_access_	skos:broader	isac:central_controller_ .
isac:base_station_	skos:broader	isac:central_controller_ .
<http://webisa.webdatacommons.org/concept/telephone+switching+office_mtso_>	skos:broader	isac:central_controller_ .