<http://caligraph.org/ontology/Maryland_state_historical_marker_in_Prince_George\u0027s_County>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://www.w3.org/2002/07/owl#Thing> .
<http://caligraph.org/ontology/Maryland_state_historical_marker_in_Prince_George\u0027s_County>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/List_of_Maryland_state_historical_markers_in_Prince_George\u0027s_County> .
<http://caligraph.org/ontology/Maryland_state_historical_marker_in_Prince_George\u0027s_County>	<http://www.w3.org/2000/01/rdf-schema#label>	"Maryland state historical marker in Prince George's County" .
<http://caligraph.org/ontology/Maryland_state_historical_marker_in_Prince_George\u0027s_County>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .