<http://caligraph.org/ontology/Catastrophic_collapse_of_broadcast_masts_and_towers>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://www.w3.org/2002/07/owl#Thing> .
<http://caligraph.org/ontology/Catastrophic_collapse_of_broadcast_masts_and_towers>	<http://www.w3.org/2000/01/rdf-schema#label>	"Catastrophic collapse of broadcast masts and towers" .
<http://caligraph.org/ontology/Catastrophic_collapse_of_broadcast_masts_and_towers>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/List_of_catastrophic_collapses_of_broadcast_masts_and_towers> .
<http://caligraph.org/ontology/Catastrophic_collapse_of_broadcast_masts_and_towers>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .