<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Military_tactics_by_type_of_warfare> .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Military_tactics_by_war> .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Borders_by_former_country> .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Military_tactics> .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#NamedIndividual> .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/2004/02/skos/core#altLabel>	"Sociocultural barriers" .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Borders_by_country> .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://caligraph.org/ontology/Military_tactic> .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/2004/02/skos/core#altLabel>	"cultural barriers" .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Borders_by_dependent_territory> .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Borders> .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://caligraph.org/ontology/Border> .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/2004/02/skos/core#prefLabel>	"Obstacle" .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Architectural_elements> .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/2004/02/skos/core#altLabel>	"obstruction" .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/2004/02/skos/core#altLabel>	"obstacle" .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/2002/07/owl#sameAs>	<http://dbpedia.org/resource/Obstacle> .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/2004/02/skos/core#altLabel>	"stumbling block" .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/2004/02/skos/core#altLabel>	"Suspended wobbly bridges" .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/2000/01/rdf-schema#label>	"Obstacle" .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://caligraph.org/ontology/Architectural_element> .
<http://caligraph.org/resource/Obstacle>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/List_of_military_tactics> .