Major Description
An owl:someValuesFrom restriction defines the set of resources which, for a given predicate and other type, have at least one value of that other type for that predicate.
If the ontology states that :Chair is the set of resources who are :headOf at least one resource which must itself be a :Department, then:
?x rdf:type :Chair
should be expanded to:
{ ?x :headOf ?dept .
?dept rdf:type :Department }
UNION
{?x rdf:type :Chair }
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