Some German label translations

[Msch0150]

It looks like that the data is generated from somewhere else. So I submit an "issue" instead of "pull request". Let me know if I should create a "pull request instead".
Some translation would would help me:

roman_numismatics.rdf:
<skos:prefLabel xml:lang="de">Römische Numismatik</skos:prefLabel>

roman_provincial_numismatics.rdf
<skos:prefLabel xml:lang="de">Provinzialrömische Numismatik</skos:prefLabel>

greek_numismatics.rdf
<skos:prefLabel xml:lang="de">Griechische Numismatik</skos:prefLabel>