RDF dumps broken

[nichtich]

RDF/XML dump at http://nomisma.org/nomisma.org.rdf contains a typo in line 484174 ("resouce"):

 <skos:exactMatch rdf:resouce="https://ikmk.smb.museum/ndp/person/9170"/>

This is simply ignored so script/serialize-rdfdump.py does not complain but rapper issues a warning.

Turtle genrated by rapper is broken because it contains an invalid abbreviated URI in line 3770 (():

nm:a(-)oros_colophon a skos:Concept,

Could also be a bug in rdflib used to convert to Turtle format.