But the problem seems to be that
http://www.wikidata.org/wiki/Q1000
actually seems to be an information resource, i.e. under this URI html
content is directly being returned (rather than being http 303
redirected).
Also, checking with
http://validator.linkeddata.org/vapour I received
an error about invalid response (I am not sure whether this is a
problem with Vapour or Wikidata ...)
Gregor