<http://caligraph.org/resource/Illumination_problem>	<http://www.w3.org/2000/01/rdf-schema#label>	"Illumination problem" .
<http://caligraph.org/resource/Illumination_problem>	<http://www.w3.org/2004/02/skos/core#altLabel>	"Illumination problem#Penrose unilluminable room" .
<http://caligraph.org/resource/Illumination_problem>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Dynamical_systems> .
<http://caligraph.org/resource/Illumination_problem>	<http://www.w3.org/2004/02/skos/core#altLabel>	"unilluminable rooms" .
<http://caligraph.org/resource/Illumination_problem>	<http://www.w3.org/2002/07/owl#sameAs>	<http://dbpedia.org/resource/Illumination_problem> .
<http://caligraph.org/resource/Illumination_problem>	<http://www.w3.org/2004/02/skos/core#altLabel>	"illumination problem" .
<http://caligraph.org/resource/Illumination_problem>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://caligraph.org/ontology/Mathematical_problem> .
<http://caligraph.org/resource/Illumination_problem>	<http://www.w3.org/2004/02/skos/core#prefLabel>	"Illumination problem" .
<http://caligraph.org/resource/Illumination_problem>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://caligraph.org/ontology/Dynamical_system> .
<http://caligraph.org/resource/Roger_Penrose>	<http://caligraph.org/ontology/knownFor>	<http://caligraph.org/resource/Illumination_problem> .
<http://caligraph.org/resource/Illumination_problem>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#NamedIndividual> .
<http://caligraph.org/resource/Illumination_problem>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Mathematical_problems> .