This is an example of the usage of owl:someValuesFrom
This example works with:
* /owl (the Jena OWL reasoner)
* /owl2 (the Hermit Reasoning Service).
This example does not work with /rdfs, and does not work
with /owlmini, because the Jena OWL(mini) reasoner
omits the
forward entailments for owl:someValuesFrom restrictions.