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<http://caligraph.org/resource/Bibliography_of_United_States_presidential_spouses_and_first_ladies>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Bibliographies_by_writer> .
<http://caligraph.org/resource/Bibliography_of_United_States_presidential_spouses_and_first_ladies>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://caligraph.org/ontology/Bibliography_of_people> .
<http://caligraph.org/resource/Bibliography_of_United_States_presidential_spouses_and_first_ladies>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Bibliographies_by_writer_nationality> .
<http://caligraph.org/resource/Bibliography_of_United_States_presidential_spouses_and_first_ladies>	<http://www.w3.org/2004/02/skos/core#prefLabel>	"Bibliography of United States presidential spouses and first ladies" .
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