<http://caligraph.org/resource/Hilbert\u0027s_fourth_problem>	<http://www.w3.org/2004/02/skos/core#altLabel>	"Blaschke\u2013Busemann measure" .
<http://caligraph.org/resource/Hilbert\u0027s_fourth_problem>	<http://www.w3.org/2000/01/rdf-schema#label>	"Hilbert's fourth problem" .
<http://caligraph.org/resource/Hilbert\u0027s_fourth_problem>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Hilbert\u0027s_problems> .
<http://caligraph.org/resource/Hilbert\u0027s_fourth_problem>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://caligraph.org/ontology/Foundation_of_geometry> .
<http://caligraph.org/resource/Hilbert\u0027s_fourth_problem>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Foundations_of_geometry> .
<http://caligraph.org/resource/Hilbert\u0027s_fourth_problem>	<http://www.w3.org/2004/02/skos/core#prefLabel>	"Hilbert's fourth problem" .
<http://caligraph.org/resource/Hilbert\u0027s_fourth_problem>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://caligraph.org/ontology/Hilbert\u0027s_problem> .
<http://caligraph.org/resource/Hilbert\u0027s_fourth_problem>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Hilbert\u0027s_problems> .
<http://caligraph.org/resource/Aleksei_Pogorelov>	<http://caligraph.org/ontology/knownFor>	<http://caligraph.org/resource/Hilbert\u0027s_fourth_problem> .
<http://caligraph.org/resource/Hilbert\u0027s_fourth_problem>	<http://www.w3.org/2002/07/owl#sameAs>	<http://dbpedia.org/resource/Hilbert\u0027s_fourth_problem> .
<http://caligraph.org/resource/Hilbert\u0027s_fourth_problem>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#NamedIndividual> .
<http://caligraph.org/resource/Hilbert\u0027s_fourth_problem>	<http://www.w3.org/2004/02/skos/core#altLabel>	"4th" .
<http://caligraph.org/resource/Hilbert\u0027s_fourth_problem>	<http://www.w3.org/2004/02/skos/core#altLabel>	"Pogolerov's theorem" .