Image entities do not have label

[vsoch]

The entities of type "http://purl.org/dc/dcmitype/Image" do not have a "http://www.w3.org/2000/01/rdf-schema#label"

  {u'@id': u'http://iri.nidash.org/d690640b-719c-4dcf-8c32-aaf90aa494bf',
   u'@type': [u'http://purl.org/dc/dcmitype/Image',
    u'http://www.w3.org/ns/prov#Entity'],
   u'http://purl.org/dc/terms/format': [{u'@value': u'image/png'}],
   u'http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#fileName': [{u'@value': u'rendered_thresh_zstat2.png'}],
   u'http://www.w3.org/ns/prov#atLocation': [{u'@type': u'http://www.w3.org/2001/XMLSchema#anyURI',
     u'@value': u'file://./rendered_thresh_zstat2.png'}]}

so if/when writing an application that is looking for a human readable thing, I have to know in advance to also look for a filename.