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    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
    xmlns:owl="http://www.w3.org/2002/07/owl#"
    xmlns:daml="http://www.daml.org/2001/03/daml+oil#"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:p2="http://www.owl-ontologies.com/assert.owl#"
    xmlns="http://ontologies.ncgr.org/MO/" >
  <rdf:Description rdf:about="http://ontologies.ncgr.org/MO/HistoryFactor">
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
    <unique_identifier rdf:datatype="http://www.w3.org/2001/XMLSchema#string">MO_82</unique_identifier>
    <rdfs:comment rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Factors that are measured or observed parts of the study but not induced or under the control of the experiment. These factors do not have protocols (e.g., epidemiology factors).</rdfs:comment>
    <rdfs:subClassOf rdf:resource="http://ontologies.ncgr.org/MO/MGEDExtendedOntology"/>
  </rdf:Description>
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    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Ontology"/>
    <owl:imports rdf:resource="http://ontologies.ncgr.org/MO/owlOntology"/>
  </rdf:Description>
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